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 = 5.
A113132
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 = 5.
Terms
- a(0) =1a(1) =1a(2) =5a(3) =50a(4) =775a(5) =16250a(6) =426750a(7) =13402500a(8) =488566875a(9) =20249281250a(10) =939823431250
External references
- oeis: A113132