Number of partitions into a triangular number of parts.

Terms

a(0) =1a(1) =1a(2) =1a(3) =2a(4) =2a(5) =3a(6) =5a(7) =6a(8) =8a(9) =11a(10) =15a(11) =19a(12) =26a(13) =32a(14) =42a(15) =54a(16) =69a(17) =86a(18) =111a(19) =137a(20) =173a(21) =215a(22) =268a(23) =329a(24) =409a(25) =499a(26) =614a(27) =748a(28) =914a(29) =1106