OA(8,7,2,2)

λ = 2, 1 / 8

d(C) = 4

ρ(C) ≤ 3

After reduction: 1 / 4

d(C) = 4

ρ(C) ≤ 3

↙    ↘

OA(4,6,2,1)

λ = 2, 7 / 18

1 ≤ d(C) ≤ 4

ρ(C) ≤ 3

OA(4,6,2,1)

OA(8,6,2,2)

λ = 2, 1 / 5

d(C) = 3

ρ(C) ≤ 2

After reduction: 1 / 3

d(C) = 3

ρ(C) ≤ 2

↙    ↘

OA(4,5,2,1)

λ = 2, 5 / 12

1 ≤ d(C) ≤ 3

ρ(C) ≤ 2

OA(4,5,2,1)

OA(8,5,2,2)

λ = 2, 1 / 3

d(C) = 2

ρ(C) = 1

After reduction: 1 / 3

d(C) = 2

ρ(C) = 1

↙    ↘

OA(4,4,2,1)

λ = 2, 4 / 8

1 ≤ d(C) ≤ 2

ρ(C) ≤ 2

OA(4,4,2,1)

OA(8,4,2,2)

λ = 2, 2 / 4

1 ≤ d(C) ≤ 2

ρ(C) = 1

After reduction: 2 / 4

1 ≤ d(C) ≤ 2

ρ(C) = 1

↙    ↘

OA(4,3,2,1)

λ = 2, 3 / 5

1 ≤ d(C) ≤ 2

ρ(C) = 1

OA(4,3,2,1)

OA(8,3,2,2)

λ = 2, 2 / 3

d(C) = 2

ρ(C) = 1

↙    ↘

OA(4,2,2,1)

λ = 2, 2 / 3

d(C) = 2

ρ(C) = 1

OA(4,2,2,1)

OA(8,2,2,2)

λ = 2, 1 / 1

d(C) = 1

ρ(C) = 0

↙    ↘

OA(4,1,2,1)

λ = 2, 1 / 1

d(C) = 1

ρ(C) = 0

OA(4,1,2,1)