Coefficient of [x^(4*n+2)] in e.g.f. tan(cosh(x) - cos(x)).

A013472

Coefficient of [x^(4*n+2)] in e.g.f. tan(cosh(x) - cos(x)).

Terms

    a(0) =2a(1) =242a(2) =493922a(3) =4867022162

External references