a(n+1) = (2n+3)*a(n) - 2n*a(n-1) + 8n, a(0) = 1, a(1) = 3.
A007566
a(n+1) = (2n+3)*a(n) - 2n*a(n-1) + 8n, a(0) = 1, a(1) = 3.
Terms
- a(0) =1a(1) =3a(2) =21a(3) =151a(4) =1257a(5) =12651a(6) =151933a(7) =2127231a(8) =34035921a(9) =612646867a(10) =12252937701a(11) =269564629863
External references
- oeis: A007566