-1722

Appears in sequences

• G.f.: Product_{n>=1} (1 - A002203(n)*x^n + (-1)^n*x^(2*n))^3 where A002203(n) is the companion Pell numbers.at n=7A204383
• Coefficients in the expansion Product_{ n>=1 } (1-q^(2n-1))^2/(1-q^(2n))^2.at n=17A274621
• a(n) = A173557(n) * A345001(n).at n=42A345049
• Expansion of 1/(Sum_{k>=0} x^(k^2))^3.at n=22A363775