A039310 - OEIS

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A039310

Numbers whose base-7 representation has the same nonzero number of 0's and 3's.

21, 52, 70, 101, 119, 148, 149, 151, 152, 153, 154, 161, 175, 182, 189, 199, 217, 248, 266, 297, 315, 353, 360, 365, 366, 368, 369, 370, 374, 381, 388, 395, 413, 444, 462, 491, 492, 494, 495, 496, 497, 504, 518, 525, 532, 542, 560, 591, 609, 640, 658, 696

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OFFSET

1,1

LINKS

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

MATHEMATICA

Select[Range[700], DigitCount[#, 7, 0]==DigitCount[#, 7, 3]>0&] (* Harvey P. Dale, Sep 15 2011 *)

CROSSREFS

Cf. A007093.

Sequence in context: A146593 A176588 A043133 * A043913 A280914 A347837

Adjacent sequences: A039307 A039308 A039309 * A039311 A039312 A039313

KEYWORD

nonn,base,easy

AUTHOR

Olivier Gérard

STATUS

approved