a(0) = 1; a(n) = 4 * n * a(n-1) + Sum_{k=0..n-1} binomial(n,k) * a(k).
A343674
a(0) = 1; a(n) = 4 * n * a(n-1) + Sum_{k=0..n-1} binomial(n,k) * a(k).
Terms
- a(0) =1a(1) =5a(2) =51a(3) =781a(4) =15947a(5) =407021a(6) =12466251a(7) =445452813a(8) =18191122219a(9) =835737327661
External references
- oeis: A343674