E.g.f.: Sum_{k>=1} (x^k/k! / Product_{i=1..k} (1-x^i)).
A133148
E.g.f.: Sum_{k>=1} (x^k/k! / Product_{i=1..k} (1-x^i)).
Terms
- a(0) =1a(1) =3a(2) =10a(3) =53a(4) =286a(5) =2227a(6) =16682a(7) =164089a(8) =1619506a(9) =19139231a(10) =228289282a(11) =3233324437a(12) =45177961154a(13) =727739459371
External references
- oeis: A133148