Expansion of e.g.f. exp(x*tanh(x/2)) (even powers only).
A296836
Expansion of e.g.f. exp(x*tanh(x/2)) (even powers only).
Terms
- a(0) =1a(1) =1a(2) =2a(3) =3a(4) =-3a(5) =20a(6) =105a(7) =-5271a(8) =133826a(9) =-2714517a(10) =25525845a(11) =2131781300a(12) =-235250824479
External references
- oeis: A296836