Coefficient of x^n in Product_{k>=1} ((1 + x^k) / (1 - x^k))^(k^n).

A270923

Coefficient of x^n in Product_{k>=1} ((1 + x^k) / (1 - x^k))^(k^n).

Terms

    a(0) =1a(1) =2a(2) =10a(3) =88a(4) =1414a(5) =46648a(6) =3026028a(7) =373615284a(8) =92794268694

External references