Numerators of coefficients in expansion of e.g.f. tan(x)/tanh(x) (even powers only).

A296628

Numerators of coefficients in expansion of e.g.f. tan(x)/tanh(x) (even powers only).

Terms

    a(0) =1a(1) =4a(2) =16a(3) =1408a(4) =13568a(5) =606208a(6) =61878272a(7) =1956380672a(8) =21143027712

External references