Expansion of e.g.f.: sech(tan(x)*log(x+1))=1-12/4!*x^4+60/5!*x^5-570/6!*x^6+3780/7!*x^7...

A012360

Expansion of e.g.f.: sech(tan(x)*log(x+1))=1-12/4!*x^4+60/5!*x^5-570/6!*x^6+3780/7!*x^7...

Terms

    a(0) =1a(1) =0a(2) =0a(3) =0a(4) =-12a(5) =60a(6) =-570a(7) =3780a(8) =-26880a(9) =145152a(10) =67800a(11) =-19702320a(12) =483806664a(13) =-8808530016a(14) =143791860576

External references