Expansion of Product_{k>0} (1 - d(k)*x^k), where d(k) is the number of divisors of k.

Terms

a(0) =1a(1) =-1a(2) =-2a(3) =0a(4) =-1a(5) =5a(6) =0a(7) =6a(8) =0a(9) =-5a(10) =9a(11) =-14a(12) =-18a(13) =-13a(14) =31a(15) =-26a(16) =-3a(17) =-5a(18) =34a(19) =18a(20) =21a(21) =117a(22) =-36a(23) =-10a(24) =-64a(25) =52a(26) =-140a(27) =276a(28) =-142a(29) =-232