O.g.f.: Sum_{n>=0} n^(2*n) * (1+n*x)^n * x^n/n! * exp(-n^2*x*(1+n*x)).
A218671
O.g.f.: Sum_{n>=0} n^(2*n) * (1+n*x)^n * x^n/n! * exp(-n^2*x*(1+n*x)).
Terms
- a(0) =1a(1) =1a(2) =8a(3) =120a(4) =2635a(5) =76503a(6) =2764957a(7) =119634152a(8) =6030195490a(9) =347037131298
External references
- oeis: A218671