Triangular numbers representable as 3^x + y^3.

Terms

a(0) =1a(1) =3a(2) =10a(3) =28a(4) =36a(5) =91a(6) =1081a(7) =2278a(8) =2926a(9) =8001a(10) =46665a(11) =5639761a(12) =10911456a(13) =166066200a(14) =341532180a(15) =3137785371