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 = 7.
A113134
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 = 7.
Terms
- a(0) =1a(1) =1a(2) =7a(3) =98a(4) =2107a(5) =61054a(6) =2215094a(7) =96203268a(8) =4856212179a(9) =279081882086
External references
- oeis: A113134