A027145 a(n) = A027144(2n, n).

1, 4, 12, 80, 304, 2176, 8832, 64768, 271104, 2013184, 8579072, 64200704, 276815872, 2082406400, 9053405184, 68364861440, 299056168960, 2264753766400, 9954207989760, 75553161871360, 333336432082944, 2534637351993344, 11217239353065472, 85421341058007040, 379009013460762624

Offset: 0

Author

Clark Kimberling

Keywords

• nonn

Extensions

More terms from Sean A. Irvine, Oct 24 2019