Expansion of Sum_{k>=0} k! * ( x * (1+x^2) )^k.
A370509
Expansion of Sum_{k>=0} k! * ( x * (1+x^2) )^k.
Terms
- a(0) =1a(1) =1a(2) =2a(3) =7a(4) =28a(5) =138a(6) =818a(7) =5658a(8) =44784a(9) =399366a(10) =3962256a(11) =43289760a(12) =516432984a(13) =6679346280a(14) =93091875120
External references
- oeis: A370509