Triangular numbers composed of digits {4,5,6}.

Terms

a(0) =6a(1) =45a(2) =55a(3) =66a(4) =465a(5) =666a(6) =4465a(7) =4656a(8) =5565a(9) =6555a(10) =46665a(11) =544446a(12) =4465566a(13) =5456556a(14) =5656566a(15) =64564566