E.g.f.: exp( Sum_{n>=1} sigma(n!) * x^n/n! ).
A294346
E.g.f.: exp( Sum_{n>=1} sigma(n!) * x^n/n! ).
Terms
- a(0) =1a(1) =1a(2) =4a(3) =22a(4) =154a(5) =1306a(6) =12874a(7) =145954a(8) =1843660a(9) =25840684a(10) =397040064a(11) =6637371896a(12) =119517187984
External references
- oeis: A294346