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

Terms

a(0) =1a(1) =0a(2) =0a(3) =6a(4) =24a(5) =60a(6) =135a(7) =354a(8) =972a(9) =2684a(10) =6990a(11) =17802a(12) =44627a(13) =111582a(14) =277329a(15) =684164a(16) =1671984a(17) =4050096a(18) =9735209a(19) =23238480a(20) =55120950a(21) =129940442a(22) =304502583a(23) =709464798a(24) =1643920584a(25) =3789158988a(26) =8690016942a(27) =19833550266a(28) =45056952957a(29) =101900481462