Expansion of e.g.f. (sec(x) + tan(x))/(1 - 2*x).
A308521
Expansion of e.g.f. (sec(x) + tan(x))/(1 - 2*x).
Terms
- a(0) =1a(1) =3a(2) =13a(3) =80a(4) =645a(5) =6466a(6) =77653a(7) =1087414a(8) =17400009a(9) =313208098a(10) =6264212481a(11) =137813028374
External references
- oeis: A308521