OA(128,9,2,5)

λ = 4, 6 / 16

1 ≤ d(C) ≤ 2

ρ(C) = 1

After reduction: 1 / 2

d(C) = 2

ρ(C) = 1

↙    ↘

OA(64,8,2,4)

λ = 4, 5 / 18

1 ≤ d(C) ≤ 2

ρ(C) = 1

OA(64,8,2,4)

After reduction: 1 / 3

d(C) = 2

ρ(C) = 1

After reduction: 1 / 3

  ↙     ↘   

   ↙     ↘  

OA(32,7,2,3)

λ = 4, 11 / 27

1 ≤ d(C) ≤ 2

ρ(C) ≤ 2

OA(32,7,2,3)

OA(32,7,2,3)

After reduction: 4 / 10

1 ≤ d(C) ≤ 2

ρ(C) ≤ 2

After reduction: 4 / 10

After reduction: 4 / 10

  ↙     ↘   

  ↙     ↘   

   ↙     ↘  

OA(16,6,2,2)

λ = 4, 12 / 33

1 ≤ d(C) ≤ 2

ρ(C) ≤ 2

OA(16,6,2,2)

OA(16,6,2,2)

OA(16,6,2,2)

After reduction: 9 / 29

1 ≤ d(C) ≤ 2

ρ(C) ≤ 2

After reduction: 9 / 29

After reduction: 9 / 29

After reduction: 9 / 29

  ↙    ↘   

  ↙    ↘   

  ↙    ↘   

   ↙    ↘  

OA(8,5,2,1)

λ = 4, 46 / 73

1 ≤ d(C) ≤ 2

ρ(C) ≤ 2

OA(8,5,2,1)

OA(8,5,2,1)

OA(8,5,2,1)

OA(8,5,2,1)

OA(128,8,2,5)

λ = 4, 7 / 14

1 ≤ d(C) ≤ 2

ρ(C) = 1

After reduction: 7 / 14

1 ≤ d(C) ≤ 2

ρ(C) = 1

↙    ↘

OA(64,7,2,4)

λ = 4, 7 / 14

1 ≤ d(C) ≤ 2

ρ(C) = 1

OA(64,7,2,4)

After reduction: 7 / 14

1 ≤ d(C) ≤ 2

ρ(C) = 1

After reduction: 7 / 14

  ↙     ↘   

   ↙     ↘  

OA(32,6,2,3)

λ = 4, 11 / 18

1 ≤ d(C) ≤ 2

ρ(C) = 1

OA(32,6,2,3)

OA(32,6,2,3)

After reduction: 8 / 15

1 ≤ d(C) ≤ 2

ρ(C) = 1

After reduction: 8 / 15

After reduction: 8 / 15

  ↙     ↘   

  ↙     ↘   

   ↙     ↘  

OA(16,5,2,2)

λ = 4, 9 / 18

1 ≤ d(C) ≤ 2

ρ(C) = 1

OA(16,5,2,2)

OA(16,5,2,2)

OA(16,5,2,2)

After reduction: 9 / 18

1 ≤ d(C) ≤ 2

ρ(C) = 1

After reduction: 9 / 18

After reduction: 9 / 18

After reduction: 9 / 18

  ↙    ↘   

  ↙    ↘   

  ↙    ↘   

   ↙    ↘  

OA(8,4,2,1)

λ = 4, 23 / 33

1 ≤ d(C) ≤ 2

ρ(C) ≤ 2

OA(8,4,2,1)

OA(8,4,2,1)

OA(8,4,2,1)

OA(8,4,2,1)

OA(128,7,2,5)

λ = 4, 6 / 9

d(C) = 1

ρ(C) = 1

After reduction: 6 / 9

d(C) = 1

ρ(C) = 1

↙    ↘

OA(64,6,2,4)

λ = 4, 6 / 9

d(C) = 1

ρ(C) = 1

OA(64,6,2,4)

After reduction: 6 / 9

d(C) = 1

ρ(C) = 1

After reduction: 6 / 9

  ↙     ↘   

   ↙     ↘  

OA(32,5,2,3)

λ = 4, 6 / 9

d(C) = 1

ρ(C) = 1

OA(32,5,2,3)

OA(32,5,2,3)

After reduction: 6 / 9

d(C) = 1

ρ(C) = 1

After reduction: 6 / 9

After reduction: 6 / 9

  ↙     ↘   

  ↙     ↘   

   ↙     ↘  

OA(16,4,2,2)

λ = 4, 6 / 9

d(C) = 1

ρ(C) = 1

OA(16,4,2,2)

OA(16,4,2,2)

OA(16,4,2,2)

After reduction: 6 / 9

d(C) = 1

ρ(C) = 1

After reduction: 6 / 9

After reduction: 6 / 9

After reduction: 6 / 9

  ↙    ↘   

  ↙    ↘   

  ↙    ↘   

   ↙    ↘  

OA(8,3,2,1)

λ = 4, 10 / 13

d(C) = 1

ρ(C) = 1

OA(8,3,2,1)

OA(8,3,2,1)

OA(8,3,2,1)

OA(8,3,2,1)

OA(128,6,2,5)

λ = 4, 4 / 5

d(C) = 1

ρ(C) = 1

↙    ↘

OA(64,5,2,4)

λ = 4, 4 / 5

d(C) = 1

ρ(C) = 1

OA(64,5,2,4)

  ↙     ↘   

   ↙     ↘  

OA(32,4,2,3)

λ = 4, 4 / 5

d(C) = 1

ρ(C) = 1

OA(32,4,2,3)

OA(32,4,2,3)

  ↙     ↘   

  ↙     ↘   

   ↙     ↘  

OA(16,3,2,2)

λ = 4, 4 / 5

d(C) = 1

ρ(C) = 1

OA(16,3,2,2)

OA(16,3,2,2)

OA(16,3,2,2)

  ↙     ↘   

  ↙     ↘   

  ↙     ↘   

   ↙     ↘  

OA(8,2,2,1)

λ = 4, 4 / 5

d(C) = 1

ρ(C) = 1

OA(8,2,2,1)

OA(8,2,2,1)

OA(8,2,2,1)

OA(8,2,2,1)

OA(128,5,2,5)

λ = 4, 1 / 1

d(C) = 1

ρ(C) = 0

↙    ↘

OA(64,4,2,4)

λ = 4, 1 / 1

d(C) = 1

ρ(C) = 0

OA(64,4,2,4)

  ↙     ↘   

   ↙     ↘  

OA(32,3,2,3)

λ = 4, 1 / 1

d(C) = 1

ρ(C) = 0

OA(32,3,2,3)

OA(32,3,2,3)

  ↙     ↘   

  ↙     ↘   

   ↙     ↘  

OA(16,2,2,2)

λ = 4, 1 / 1

d(C) = 1

ρ(C) = 0

OA(16,2,2,2)

OA(16,2,2,2)

OA(16,2,2,2)

  ↙     ↘   

  ↙     ↘   

  ↙     ↘   

   ↙     ↘  

OA(8,1,2,1)

λ = 4, 1 / 1

d(C) = 1

ρ(C) = 0

OA(8,1,2,1)

OA(8,1,2,1)

OA(8,1,2,1)

OA(8,1,2,1)