Expansion of (Product_{j>=1} (1-(-x)^j) - 1)^20 in powers of x.

Terms

a(0) =1a(1) =-20a(2) =190a(3) =-1140a(4) =4825a(5) =-15124a(6) =35320a(7) =-57760a(8) =45220a(9) =80560a(10) =-405954a(11) =910460a(12) =-1289340a(13) =852340a(14) =1259530a(15) =-5357924a(16) =10151510a(17) =-12048660a(18) =5883350a(19) =12186960a(20) =-40135713a(21) =66244280a(22) =-69648870a(23) =28191460a(24) =66920755a(25) =-195366168a(26) =300881530