Expansion of 1 / Sum_{k>=0} (-x)^(k*(3*k - 1)/2).

Terms

a(0) =1a(1) =1a(2) =1a(3) =1a(4) =1a(5) =2a(6) =3a(7) =4a(8) =5a(9) =6a(10) =8a(11) =11a(12) =14a(13) =18a(14) =23a(15) =30a(16) =40a(17) =52a(18) =67a(19) =86a(20) =111a(21) =145a(22) =188a(23) =243a(24) =314a(25) =406a(26) =527a(27) =683a(28) =883a(29) =1141