a(n) = (2(n+1)(2n+1)-1) * a(n-1) + 2n(2n-1) * a(n-2), a(0) = 1, a(1) = 11.
A206532
a(n) = (2(n+1)(2n+1)-1) * a(n-1) + 2n(2n-1) * a(n-2), a(0) = 1, a(1) = 11.
Terms
- a(0) =1a(1) =11a(2) =331a(3) =18535a(4) =1668151a(5) =220195931a(6) =40075659443
External references
- oeis: A206532