a(n) = [x^(n^2)] Product_{k=1..n} theta_3(q^k), where theta_3() is the Jacobi theta function.

A321179

a(n) = [x^(n^2)] Product_{k=1..n} theta_3(q^k), where theta_3() is the Jacobi theta function.

Terms

    a(0) =1a(1) =2a(2) =2a(3) =14a(4) =44a(5) =174a(6) =988a(7) =4314a(8) =20780a(9) =126320a(10) =692328a(11) =3836166a(12) =23160914a(13) =135752866a(14) =803203484a(15) =4902966108a(16) =29745996950a(17) =181712320506

External references