Triangle T(n, k) = A001263(n*f(n,k) + 1, f(n,k) + 1), where f(n, k) = k if k <= floor(n/2) otherwise n-k, read by rows.

A157243

Triangle T(n, k) = A001263(n*f(n,k) + 1, f(n,k) + 1), where f(n, k) = k if k <= floor(n/2) otherwise n-k, read by rows.

Terms

    a(0) =1a(1) =1a(2) =1a(3) =1a(4) =3a(5) =1a(6) =1a(7) =6a(8) =6a(9) =1a(10) =1a(11) =10a(12) =336a(13) =10a(14) =1a(15) =1a(16) =15a(17) =825a(18) =825a(19) =15a(20) =1a(21) =1a(22) =21a(23) =1716a(24) =197676a(25) =1716a(26) =21a(27) =1a(28) =1a(29) =28

External references