O.g.f.: Sum_{n>=0} 1/(1-n^2*x)^n * x^n/n! * exp(-x/(1-n^2*x)).
A218668
O.g.f.: Sum_{n>=0} 1/(1-n^2*x)^n * x^n/n! * exp(-x/(1-n^2*x)).
Terms
- a(0) =1a(1) =0a(2) =1a(3) =3a(4) =22a(5) =161a(6) =1546a(7) =18857a(8) =270320a(9) =4471693a(10) =85455574a(11) =1865128265a(12) =45735737037
External references
- oeis: A218668