Triangle read by rows: T(n,k) = t(n-k, k); t(n,m) = f(m)*t(n-1,m) + f(n)*t(n,m-1), where f(x) = 8*x + 2.

A257618

Triangle read by rows: T(n,k) = t(n-k, k); t(n,m) = f(m)*t(n-1,m) + f(n)*t(n,m-1), where f(x) = 8*x + 2.

Terms

    a(0) =1a(1) =2a(2) =2a(3) =4a(4) =40a(5) =4a(6) =8a(7) =472a(8) =472a(9) =8a(10) =16a(11) =4928a(12) =16992a(13) =4928a(14) =16a(15) =32a(16) =49824a(17) =433984a(18) =433984a(19) =49824a(20) =32a(21) =64a(22) =499584a(23) =9505728a(24) =22567168a(25) =9505728a(26) =499584a(27) =64a(28) =128a(29) =4999040

External references