Related to Euler numbers, expansion of e.g.f. sec(x)*tan^2(x).
A002735
Related to Euler numbers, expansion of e.g.f. sec(x)*tan^2(x).
Terms
- a(0) =4a(1) =14a(2) =56a(3) =331a(4) =1324a(5) =12284a(6) =49136a(7) =663061a(8) =2652244a(9) =49164554a(10) =196658216a(11) =4798037791a(12) =19192151164a(13) =596372040824
External references
- oeis: A002735