a(0) = a(1) = 1, a(2) = x, a(3) = 2x^2, a(n) = x*(n-1)*a(n-1) + Sum_{j=2..n-2} (j-1)*a(j)*a(n-j), n>=4 and for x = 6.
A113133
a(0) = a(1) = 1, a(2) = x, a(3) = 2x^2, a(n) = x*(n-1)*a(n-1) + Sum_{j=2..n-2} (j-1)*a(j)*a(n-j), n>=4 and for x = 6.
Terms
- a(0) =1a(1) =1a(2) =6a(3) =72a(4) =1332a(5) =33264a(6) =1040256a(7) =38926656a(8) =1692061488a(9) =83688313536
External references
- oeis: A113133