Triangular numbers that are binary palindromes.

Terms

a(0) =0a(1) =1a(2) =3a(3) =15a(4) =21a(5) =45a(6) =153a(7) =231a(8) =325a(9) =561a(10) =903a(11) =2145a(12) =4095a(13) =8385a(14) =14535a(15) =33153a(16) =58311a(17) =63903a(18) =101475a(19) =131841a(20) =240471a(21) =399171a(22) =525825a(23) =932295a(24) =976503a(25) =1044735a(26) =1308153a(27) =1395285a(28) =1532125a(29) =2100225