Triangular numbers representable as x*y+x+y such that x and y are triangular numbers, x>=y>1.

Terms

a(0) =15a(1) =120a(2) =153a(3) =351a(4) =406a(5) =741a(6) =1891a(7) =3081a(8) =3403a(9) =4465a(10) =5151a(11) =5565a(12) =6555a(13) =9453a(14) =9591a(15) =18721a(16) =22791a(17) =38226a(18) =39903a(19) =46056a(20) =52326a(21) =79401a(22) =85491a(23) =91378a(24) =159895a(25) =187578a(26) =207690a(27) =222111a(28) =227475a(29) =229503