Second of two complementary trees generated by the triangular numbers. The other tree is A183231.

Terms

a(0) =2a(1) =8a(2) =5a(3) =53a(4) =12a(5) =26a(6) =9a(7) =1538a(8) =63a(9) =103a(10) =17a(11) =404a(12) =33a(13) =64a(14) =14a(15) =1186568a(16) =1593a(17) =2143a(18) =74a(19) =5563a(20) =117a(21) =188a(22) =23a(23) =82619a(24) =432a(25) =628a(26) =41a(27) =2209a(28) =75a(29) =134