Triangular numbers composed of digits {0,3,6}.

Terms

a(0) =3a(1) =6a(2) =36a(3) =66a(4) =300a(5) =630a(6) =666a(7) =3003a(8) =66066a(9) =333336a(10) =600060a(11) =630003a(12) =3306306a(13) =30330366a(14) =330360660a(15) =6603360660