A043409 Numbers whose base-7 representation contains exactly one 4.

4, 11, 18, 25, 28, 29, 30, 31, 33, 34, 39, 46, 53, 60, 67, 74, 77, 78, 79, 80, 82, 83, 88, 95, 102, 109, 116, 123, 126, 127, 128, 129, 131, 132, 137, 144, 151, 158, 165, 172, 175, 176, 177, 178, 180, 181, 186, 193, 196, 197, 198, 199

Offset

1,1

Links

Table of n, a(n) for n=1..52.

Mathematica

Select[Range[200], DigitCount[#, 7, 4]==1&]  (* Harvey P. Dale, Jan 17 2011 *)

Crossrefs

Cf. A007093.

Sequence in context: A059771 A325618 A361131 * A030610 A003327 A025403

Adjacent sequences: A043406 A043407 A043408 * A043410 A043411 A043412

Keyword

nonn,base,easy

Author

Clark Kimberling

Status

approved