a(1) = 1, a(2) = 2, a(n+2) = 2*a(n+1) + (n + 1)*(n + 2)*a(n).
A142983
a(1) = 1, a(2) = 2, a(n+2) = 2*a(n+1) + (n + 1)*(n + 2)*a(n).
Terms
- a(0) =1a(1) =2a(2) =10a(3) =44a(4) =288a(5) =1896a(6) =15888a(7) =137952a(8) =1419840a(9) =15255360a(10) =186693120a(11) =2387093760a(12) =33898314240a(13) =502247692800
External references
- oeis: A142983