Triangular numbers composed of digits {3,5,6}.

Terms

a(0) =3a(1) =6a(2) =36a(3) =55a(4) =66a(5) =666a(6) =3655a(7) =5356a(8) =5565a(9) =6555a(10) =333336a(11) =3635556a(12) =5656566a(13) =35536665a(14) =56365653a(15) =56663335a(16) =63365653a(17) =655636366a(18) =53533355655a(19) =55663663653a(20) =533533653555a(21) =555533363556