Expansion of e.g.f. exp(4*x)*(sec(x) + tan(x)).
A307879
Expansion of e.g.f. exp(4*x)*(sec(x) + tan(x)).
Terms
- a(0) =1a(1) =5a(2) =25a(3) =126a(4) =645a(5) =3380a(6) =18285a(7) =103036a(8) =610345a(9) =3833540a(10) =25714345a(11) =185107596a(12) =1433220045a(13) =11932724900a(14) =106613406405
External references
- oeis: A307879