T(n, k) = 2^n * n! * [x^k] [z^n] (exp(z) + 1)^2/(4*exp(x*z)), triangle read by rows, for 0 <= k <= n.

A326479

T(n, k) = 2^n * n! * [x^k] [z^n] (exp(z) + 1)^2/(4*exp(x*z)), triangle read by rows, for 0 <= k <= n.

Terms

    a(0) =1a(1) =2a(2) =-2a(3) =6a(4) =-8a(5) =4a(6) =20a(7) =-36a(8) =24a(9) =-8a(10) =72a(11) =-160a(12) =144a(13) =-64a(14) =16a(15) =272a(16) =-720a(17) =800a(18) =-480a(19) =160a(20) =-32a(21) =1056a(22) =-3264a(23) =4320a(24) =-3200a(25) =1440a(26) =-384a(27) =64a(28) =4160a(29) =-14784

External references