Expansion of e.g.f.: sech(tanh(x)+log(x+1))=1-4/2!*x^2+6/3!*x^3+77/4!*x^4-340/5!*x^5...

A013128

Expansion of e.g.f.: sech(tanh(x)+log(x+1))=1-4/2!*x^2+6/3!*x^3+77/4!*x^4-340/5!*x^5...

Terms

    a(0) =1a(1) =0a(2) =-4a(3) =6a(4) =77a(5) =-340a(6) =-3574a(7) =34062a(8) =278337a(9) =-5275800a(10) =-28795584a(11) =1159543110a(12) =2472700941a(13) =-340042014156a(14) =704790251070

External references