A039392 - OEIS

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A039392

Numbers whose base-9 representation has the same nonzero number of 7's and 8's.

0

71, 79, 152, 160, 233, 241, 314, 322, 395, 403, 476, 484, 557, 565, 575, 584, 593, 602, 611, 620, 629, 639, 640, 641, 642, 643, 644, 645, 655, 664, 673, 682, 691, 700, 709, 711, 712, 713, 714, 715, 716, 717, 800, 808, 881, 889, 962, 970, 1043, 1051

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OFFSET

1,1

LINKS

Table of n, a(n) for n=1..50.

MATHEMATICA

b9Q[n_]:=Module[{idn9=IntegerDigits[n, 9]}, Count[idn9, 7]==Count[idn9, 8]!=0]

Select[Range[1100], b9Q] (* Harvey P. Dale, Feb 14 2011 *)

CROSSREFS

Sequence in context: A159025 A033245 A139914 * A043215 A043995 A134936

Adjacent sequences: A039389 A039390 A039391 * A039393 A039394 A039395

KEYWORD

nonn,base,easy

AUTHOR

Olivier Gérard

STATUS

approved