Expansion of e.g.f. exp(x) * (sec(exp(x) - 1))^2.
A080832
Expansion of e.g.f. exp(x) * (sec(exp(x) - 1))^2.
Terms
- a(0) =1a(1) =1a(2) =3a(3) =13a(4) =67a(5) =421a(6) =3115a(7) =26349a(8) =250867a(9) =2655541a(10) =30929019a(11) =393019837a(12) =5410699075a(13) =80221867909
External references
- oeis: A080832