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

Terms

a(0) =1a(1) =1a(2) =4a(3) =10a(4) =29a(5) =62a(6) =176a(7) =363a(8) =931a(9) =2029a(10) =4751a(11) =10062a(12) =23749a(13) =48959a(14) =109342a(15) =230981a(16) =500344a(17) =1031667a(18) =2223218a(19) =4531585a(20) =9570395a(21) =19523510a(22) =40411313a(23) =81628389a(24) =168484616a(25) =336850254a(26) =685112670a(27) =1369559157a(28) =2757908932a(29) =5464925114