Expansion of Product_{m>=1} (1+m*q^m)^-26.

Terms

a(0) =1a(1) =-26a(2) =299a(3) =-2002a(4) =8827a(5) =-29406a(6) =93184a(7) =-320996a(8) =1039753a(9) =-2889432a(10) =7786272a(11) =-22551126a(12) =62828467a(13) =-158350636a(14) =399157837a(15) =-1050026250a(16) =2646932132a(17) =-6320963454a(18) =15276388101a(19) =-37320661638a(20) =88295712804