A013153 Expansion of e.g.f.: exp(tanh(x)+sinh(x))=1+2*x+4/2!*x^2+7/3!*x^3+8/4!*x^4+9/5!*x^5...

1, 2, 4, 7, 8, 9, 118, 865, 1912, -12375, -53094, 848621, 7487532, -34580971, -722809274, 1631142593, 92118225104, 100600927153, -13286089862286, -62231815768555, 2227449108601940, 20774283625070381

Offset

0,2

Links

Table of n, a(n) for n=0..21.

Mathematica

With[{nn=30}, CoefficientList[Series[Exp[Tanh[x]+Sinh[x]], {x, 0, nn}], x] Range[0, nn]!] (* Harvey P. Dale, Apr 29 2019 *)

Crossrefs

Sequence in context: A035251 A141401 A132604 * A075663 A325419 A139212

Adjacent sequences: A013150 A013151 A013152 * A013154 A013155 A013156

Keyword

sign

Author

Patrick Demichel (patrick.demichel(AT)hp.com)

Extensions

Definition clarified by Harvey P. Dale, Apr 29 2019

Status

approved