172416

Appears in sequences

• Expansion of Product_{k>=1} (Product_{j=1..k} (1 + x^(k*j))^k).at n=23A327064
• G.f. A(x) satisfies A(x) = sqrt( (1 + 2*x*A(x))/(1 - 2*x*A(x)^2) ).at n=7A379382