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

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) =15a(13) =21a(14) =28a(15) =37a(16) =49a(17) =65a(18) =88a(19) =119a(20) =160a(21) =214a(22) =285a(23) =381a(24) =511a(25) =687a(26) =923a(27) =1237a(28) =1656a(29) =2217