Expansion of Product_{k>=1} 1/(1 - x^k)^(3*k*(k-1)/2+1).

Terms

a(0) =1a(1) =1a(2) =5a(3) =15a(4) =44a(5) =115a(6) =312a(7) =790a(8) =2004a(9) =4908a(10) =11885a(11) =28170a(12) =65987a(13) =152079a(14) =346560a(15) =779808a(16) =1736460a(17) =3825995a(18) =8351733a(19) =18064545a(20) =38747740a(21) =82443251a(22) =174096564a(23) =364991008a(24) =759989218a(25) =1572126699a(26) =3231929735a(27) =6604498620a(28) =13419469596a(29) =27117216441