a(1) = 1, a(2) = 2; for n>2, a(n+1) = a(n)*(n-1) + a(n-1)*n.
A122972
a(1) = 1, a(2) = 2; for n>2, a(n+1) = a(n)*(n-1) + a(n-1)*n.
Terms
- a(0) =1a(1) =2a(2) =4a(3) =14a(4) =58a(5) =302a(6) =1858a(7) =13262a(8) =107698a(9) =980942a(10) =9905458a(11) =109844942a(12) =1327159858a(13) =17353902542a(14) =244180971058
External references
- oeis: A122972