T(n, k) = 2^n * n! * [x^k] [z^n] (4*exp(x*z))/(exp(z) + 1)^2, triangle read by rows, for 0 <= k <= n. Coefficients of Euler polynomials of order 2.
A326480
T(n, k) = 2^n * n! * [x^k] [z^n] (4*exp(x*z))/(exp(z) + 1)^2, triangle read by rows, for 0 <= k <= n. Coefficients of Euler polynomials of order 2.
Terms
- a(0) =1a(1) =-2a(2) =2a(3) =2a(4) =-8a(5) =4a(6) =4a(7) =12a(8) =-24a(9) =8a(10) =-16a(11) =32a(12) =48a(13) =-64a(14) =16a(15) =-32a(16) =-160a(17) =160a(18) =160a(19) =-160a(20) =32a(21) =272a(22) =-384a(23) =-960a(24) =640a(25) =480a(26) =-384a(27) =64a(28) =544a(29) =3808
External references
- oeis: A326480