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) = 4*x + 2.

A257612

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) = 4*x + 2.

Terms

    a(0) =1a(1) =2a(2) =2a(3) =4a(4) =24a(5) =4a(6) =8a(7) =184a(8) =184a(9) =8a(10) =16a(11) =1216a(12) =3680a(13) =1216a(14) =16a(15) =32a(16) =7584a(17) =53824a(18) =53824a(19) =7584a(20) =32a(21) =64a(22) =46208a(23) =674752a(24) =1507072a(25) =674752a(26) =46208a(27) =64a(28) =128a(29) =278912

External references