Expansion of e.g.f. arctanh(sin(x)*sin(x)), even powers only.
A012301
Expansion of e.g.f. arctanh(sin(x)*sin(x)), even powers only.
Terms
- a(0) =0a(1) =2a(2) =-8a(3) =272a(4) =-13568a(5) =1290752a(6) =-181296128a(7) =36501112832
External references
- oeis: A012301