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) = 2*x + 2.

A257609

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) = 2*x + 2.

Terms

    a(0) =1a(1) =2a(2) =2a(3) =4a(4) =16a(5) =4a(6) =8a(7) =88a(8) =88a(9) =8a(10) =16a(11) =416a(12) =1056a(13) =416a(14) =16a(15) =32a(16) =1824a(17) =9664a(18) =9664a(19) =1824a(20) =32a(21) =64a(22) =7680a(23) =76224a(24) =154624a(25) =76224a(26) =7680a(27) =64a(28) =128a(29) =31616

External references