-823

Appears in sequences

• Cube of the Steinbach matrix as a characteristic polynomial triangular array.at n=42A122185
• Expansion of Product_{k>=1} (1 + x^(3*k))^(3*k) / (1 + x^k)^k.at n=25A285294
• Expansion of g.f.: 1/(Sum_{p odd prime} x^p)^2 (even powers only).at n=18A351317