

A039266


Numbers n such that representation in base 12 has same number of 7's and 9's.


1



0, 1, 2, 3, 4, 5, 6, 8, 10, 11, 12, 13, 14, 15, 16, 17, 18, 20, 22, 23, 24, 25, 26, 27, 28, 29, 30, 32, 34, 35, 36, 37, 38, 39, 40, 41, 42, 44, 46, 47, 48, 49, 50, 51, 52, 53, 54, 56, 58, 59, 60, 61, 62, 63, 64, 65, 66, 68, 70, 71, 72, 73, 74, 75, 76, 77, 78, 80
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OFFSET

1,3


LINKS

Vincenzo Librandi, Table of n, a(n) for n = 1..1000


MATHEMATICA

Select[Range[0, 100], DigitCount[#, 12, 7] == DigitCount[#, 12, 9] &] (* Vincenzo Librandi, Oct 20 2012 *)


PROG

(MAGMA) [n: n in [0..100]  Multiplicity(S, 7) eq Multiplicity(S, 9) where S is {*d: d in Intseq(n, 12)*}]; // Bruno Berselli, Oct 20 2012


CROSSREFS

Sequence in context: A038101 A073956 A270193 * A039205 A039154 A039083
Adjacent sequences: A039263 A039264 A039265 * A039267 A039268 A039269


KEYWORD

nonn,base,easy


AUTHOR

Olivier Gérard


EXTENSIONS

An incorrect g.f. was deleted by N. J. A. Sloane, Sep 13 2009


STATUS

approved



