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

Terms

a(0) =1a(1) =2a(2) =10a(3) =32a(4) =120a(5) =342a(6) =1206a(7) =3320a(8) =10604a(9) =29578a(10) =88342a(11) =239400a(12) =702020a(13) =1863654a(14) =5262650a(15) =13948824a(16) =38427192a(17) =100244162a(18) =272822282a(19) =703972024a(20) =1883948848a(21) =4839944150a(22) =12779850278a(23) =32548367784a(24) =85335644100a(25) =215826029018a(26) =560407835934