Number of ways of writing n as the sum of n triangular numbers.

Terms

a(0) =1a(1) =1a(2) =1a(3) =4a(4) =13a(5) =31a(6) =82a(7) =253a(8) =757a(9) =2173a(10) =6341a(11) =18888a(12) =56266a(13) =167324a(14) =499773a(15) =1499059a(16) =4503557a(17) =13546893a(18) =40824379a(19) =123233868a(20) =372472353a(21) =1127080252a(22) =3414310032a(23) =10353722919a(24) =31425764410a(25) =95463814056a(26) =290222666436a(27) =882954212908