Numbers having three 6's in base 10.

Terms

a(0) =666a(1) =1666a(2) =2666a(3) =3666a(4) =4666a(5) =5666a(6) =6066a(7) =6166a(8) =6266a(9) =6366a(10) =6466a(11) =6566a(12) =6606a(13) =6616a(14) =6626a(15) =6636a(16) =6646a(17) =6656a(18) =6660a(19) =6661a(20) =6662a(21) =6663a(22) =6664a(23) =6665a(24) =6667a(25) =6668a(26) =6669a(27) =6676a(28) =6686a(29) =6696