E.g.f.: A(x) = Sum_{n>=0} exp( n*(n-1)/2 * x ) * x^n / n!.
A135742
E.g.f.: A(x) = Sum_{n>=0} exp( n*(n-1)/2 * x ) * x^n / n!.
Terms
- a(0) =1a(1) =1a(2) =1a(3) =4a(4) =19a(5) =131a(6) =1156a(7) =12622a(8) =166825a(9) =2600677a(10) =47038456a(11) =974165336a(12) =22829939089a(13) =599668759483
External references
- oeis: A135742