Expansion of e.g.f. arcsinh(cos(x)*sech(x)), even powers only.
A213069
Expansion of e.g.f. arcsinh(cos(x)*sech(x)), even powers only.
Terms
- a(0) =0a(1) =-1a(2) =3a(3) =-1a(4) =-77a(5) =-13921a(6) =791043a(7) =23892959a(8) =-3518362637a(9) =-801110007361
External references
- oeis: A213069