"666" in bases 7 and higher rewritten in base 10.

Terms

a(0) =342a(1) =438a(2) =546a(3) =666a(4) =798a(5) =942a(6) =1098a(7) =1266a(8) =1446a(9) =1638a(10) =1842a(11) =2058a(12) =2286a(13) =2526a(14) =2778a(15) =3042a(16) =3318a(17) =3606a(18) =3906a(19) =4218a(20) =4542a(21) =4878a(22) =5226a(23) =5586a(24) =5958a(25) =6342a(26) =6738a(27) =7146a(28) =7566a(29) =7998