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

Terms

a(0) =1a(1) =1a(2) =7a(3) =37a(4) =215a(5) =1251a(6) =7459a(7) =44885a(8) =272727a(9) =1668313a(10) =10263057a(11) =63423482a(12) =393440867a(13) =2448542136a(14) =15280435191a(15) =95588065737a(16) =599213418327