Expansion of (-1 + Product_{k>=1} (1 + x^k)^k)^5.

Terms

a(0) =1a(1) =10a(2) =65a(3) =320a(4) =1330a(5) =4872a(6) =16255a(7) =50335a(8) =146775a(9) =407045a(10) =1082000a(11) =2773045a(12) =6884650a(13) =16620225a(14) =39135280a(15) =90113553a(16) =203347645a(17) =450516450a(18) =981491380a(19) =2105504205a(20) =4452798556a(21) =9293254605a(22) =19158353285a(23) =39044262235a(24) =78719105560a(25) =157112112293a(26) =310599279105