a(1) = 1, a(2) = 7, a(n+2) = 7*a(n+1) + (n+1)^2*a(n).
A142981
a(1) = 1, a(2) = 7, a(n+2) = 7*a(n+1) + (n+1)^2*a(n).
Terms
- a(0) =1a(1) =7a(2) =53a(3) =434a(4) =3886a(5) =38052a(6) =406260a(7) =4708368a(8) =58959216a(9) =794092320a(10) =11454567840a(11) =176267145600
External references
- oeis: A142981