Triangle formed by left half of A101842, read by rows.

Terms

a(0) =1a(1) =1a(2) =3a(3) =1a(4) =7a(5) =16a(6) =1a(7) =15a(8) =61a(9) =115a(10) =1a(11) =31a(12) =206a(13) =626a(14) =1056a(15) =1a(16) =63a(17) =659a(18) =2989a(19) =7554a(20) =11774a(21) =1a(22) =127a(23) =2052a(24) =13308a(25) =47349a(26) =105099a(27) =154624a(28) =1a(29) =255