A039315 Numbers whose base-7 representation has the same nonzero number of 1's and 3's.

10, 22, 52, 66, 70, 72, 74, 75, 76, 80, 87, 94, 108, 120, 148, 154, 156, 158, 159, 160, 162, 176, 183, 190, 206, 218, 255, 267, 304, 316, 346, 360, 364, 366, 368, 369, 370, 374, 381, 388, 416, 444, 458, 462, 464, 466, 467, 468, 472, 479, 486, 490, 492, 494

Offset

1,1

Links

Table of n, a(n) for n=1..54.

Mathematica

Select[Range[500], DigitCount[#, 7, 1]==DigitCount[#, 7, 3]>0&] (* Harvey P. Dale, Apr 01 2023 *)

Crossrefs

Cf. A007093.

Sequence in context: A014008 A219744 A246419 * A225708 A088871 A043138

Adjacent sequences: A039312 A039313 A039314 * A039316 A039317 A039318

Keyword

nonn,base,easy

Author

Olivier Gérard

Status

approved