542336

Appears in sequences

• Expansion of Product_{i>=1, j>=1, k>=1, l>=1} (1 - x^(i*j*k*l))/(1 + x^(i*j*k*l)).at n=32A321302
• Number of unlabeled binary rooted semi-identity plane trees with 2*n - 1 nodes.at n=13A343663