Expansion of e.g.f. exp(x*(1 + x + x^2)/(1 - x^2)^2).
A308417
Expansion of e.g.f. exp(x*(1 + x + x^2)/(1 - x^2)^2).
Terms
- a(0) =1a(1) =1a(2) =3a(3) =25a(4) =145a(5) =1461a(6) =14011a(7) =169933a(8) =2231265a(9) =32572585a(10) =528302611a(11) =9146070561a(12) =174016032433
External references
- oeis: A308417