17211564

Appears in sequences

• G.f. A(x) satisfies A( x - A(x)^2 ) = x.at n=9A213591
• Square array A(n,k), n >= 0, k >= 0, read by antidiagonals downwards, where column k is the expansion of (B(x)/x)^k, where B(x) is the g.f. of A213591.at n=64A384619