Triangle T(n,k) which contains 8*n!*2^floor((n+1)/2) times the coefficient [t^n x^k] exp(t*x)/(7 + exp(4*t)) in row n, column k.

A171684

Triangle T(n,k) which contains 8*n!*2^floor((n+1)/2) times the coefficient [t^n x^k] exp(t*x)/(7 + exp(4*t)) in row n, column k.

Terms

    a(0) =1a(1) =-1a(2) =2a(3) =-3a(4) =-2a(5) =2a(6) =-11a(7) =-18a(8) =-6a(9) =4a(10) =30a(11) =-44a(12) =-36a(13) =-8a(14) =4a(15) =866a(16) =300a(17) =-220a(18) =-120a(19) =-20a(20) =8a(21) =3858a(22) =5196a(23) =900a(24) =-440a(25) =-180a(26) =-24a(27) =8a(28) =-23654a(29) =54012

External references