E.g.f.: (cosh(x) + sinh(x)*cosh(2*x)) / sqrt(1 - sinh(x)^2*sinh(2*x)^2).

A245138

E.g.f.: (cosh(x) + sinh(x)*cosh(2*x)) / sqrt(1 - sinh(x)^2*sinh(2*x)^2).

Terms

    a(0) =1a(1) =1a(2) =1a(3) =13a(4) =49a(5) =361a(6) =3121a(7) =39733a(8) =409249a(9) =6410641a(10) =91979041a(11) =1716516253a(12) =29795642449a(13) =660718214521

External references