Triangular numbers having exactly 6 divisors.

Terms

a(0) =28a(1) =45a(2) =153a(3) =171a(4) =325a(5) =4753a(6) =7381a(7) =29161a(8) =56953a(9) =65341a(10) =166753a(11) =354061a(12) =5649841a(13) =6060421a(14) =6835753a(15) =6924781a(16) =12708361a(17) =19478161a(18) =24231241a(19) =52035301a(20) =56791153a(21) =147258541a(22) =186660181a(23) =282304441a(24) =326081953a(25) =520273153a(26) =536657941a(27) =704531953a(28) =784139401a(29) =1215121753