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

Terms

a(0) =1a(1) =1a(2) =1a(3) =1a(4) =2a(5) =3a(6) =4a(7) =5a(8) =7a(9) =10a(10) =15a(11) =21a(12) =29a(13) =40a(14) =57a(15) =81a(16) =114a(17) =159a(18) =223a(19) =315a(20) =445a(21) =626a(22) =879a(23) =1236a(24) =1741a(25) =2452a(26) =3450a(27) =4852a(28) =6826a(29) =9608