a(n) = n! * [x^n] exp(2*exp(x) - x - 2). Row sums of triangle A217537.
A217924
a(n) = n! * [x^n] exp(2*exp(x) - x - 2). Row sums of triangle A217537.
Terms
- a(0) =1a(1) =1a(2) =3a(3) =9a(4) =35a(5) =153a(6) =755a(7) =4105a(8) =24323a(9) =155513a(10) =1064851a(11) =7760745a(12) =59895203a(13) =487397849a(14) =4166564147a(15) =37298443977a(16) =348667014723
External references
- oeis: A217924