a(n) equals the sum of the coefficients of x^(n-1) in A(x)^k as k=1..n, where A(x) = Sum_{n>=0} a(n)*x^n.
A206801
a(n) equals the sum of the coefficients of x^(n-1) in A(x)^k as k=1..n, where A(x) = Sum_{n>=0} a(n)*x^n.
Terms
- a(0) =1a(1) =1a(2) =3a(3) =22a(4) =285a(5) =5476a(6) =143080a(7) =4840256a(8) =205348521a(9) =10675415800a(10) =667749546288
External references
- oeis: A206801