A039132 - OEIS

A039132

Numbers whose base-10 representation has the same number of 2's and 7's.

0, 1, 3, 4, 5, 6, 8, 9, 10, 11, 13, 14, 15, 16, 18, 19, 27, 30, 31, 33, 34, 35, 36, 38, 39, 40, 41, 43, 44, 45, 46, 48, 49, 50, 51, 53, 54, 55, 56, 58, 59, 60, 61, 63, 64, 65, 66, 68, 69, 72, 80, 81, 83, 84, 85, 86, 88, 89, 90, 91, 93, 94, 95, 96, 98, 99, 100, 101, 103

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OFFSET

1,3

LINKS

Table of n, a(n) for n=1..69.

MATHEMATICA

dg27Q[n_]:=Module[{dc=DigitCount[n]}, dc[[2]]==dc[[7]]]; Select[Range[ 0, 110], dg27Q] (* Harvey P. Dale, Nov 19 2011 *)

CROSSREFS

Sequence in context: A099352 A047207 A266728 * A187970 A122488 A241403

Adjacent sequences: A039129 A039130 A039131 * A039133 A039134 A039135

KEYWORD

nonn,base,easy

AUTHOR

Olivier Gérard

STATUS

approved