G.f.: 1 = Sum_{n>=0} a(n)*x^n*Product_{k=1..n} (1-k*x)^2.
A118805
G.f.: 1 = Sum_{n>=0} a(n)*x^n*Product_{k=1..n} (1-k*x)^2.
Terms
- a(0) =1a(1) =2a(2) =11a(3) =106a(4) =1506a(5) =28736a(6) =694719a(7) =20452602a(8) =712529978a(9) =28746803264
External references
- oeis: A118805