70414

Appears in sequences

• G.f. satisfies: A(x) = 1 + x*A(x)*A(-x) + x^2*A(x)^2*A(-x)^2.at n=18A143926
• G.f. A(x) satisfies A(x) = (1 + x*A(x) + x^2*A(x)^2)^2.at n=8A143927
• -2-Knödel numbers.at n=42A225506
• Square array T(n,k), n >= 0, k >= 0, read by antidiagonals downwards, where T(n,0) = 0^n and T(n,k) = k * Sum_{r=0..n} binomial(2*n+k,r) * binomial(r,n-r)/(2*n+k) for k > 0.at n=63A378292