Expansion of the series reversion of Sum_{k>=1} x^(k*(k+1)/2).

Terms

a(0) =1a(1) =0a(2) =-1a(3) =0a(4) =3a(5) =-1a(6) =-12a(7) =9a(8) =55a(9) =-67a(10) =-267a(11) =468a(12) =1323a(13) =-3180a(14) =-6513a(15) =21267a(16) =30969a(17) =-140581a(18) =-135995a(19) =919698a(20) =494361a(21) =-5954217a(22) =-829116a(23) =38113425a(24) =-9433359a(25) =-240844482a(26) =154219912a(27) =1499076989a(28) =-1585801575a(29) =-9161079266