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A039403 Numbers n such that representation in base 10 has same nonzero number of 1's and 3's. 0
13, 31, 103, 123, 130, 132, 134, 135, 136, 137, 138, 139, 143, 153, 163, 173, 183, 193, 213, 231, 301, 310, 312, 314, 315, 316, 317, 318, 319, 321, 341, 351, 361, 371, 381, 391, 413, 431, 513, 531, 613, 631, 713, 731, 813, 831, 913, 931, 1003, 1023 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

LINKS

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

MATHEMATICA

Select[Range[1100], DigitCount[#, 10, 1]==DigitCount[#, 10, 3]>0&] (* Harvey P. Dale, May 09 2019 *)

CROSSREFS

Sequence in context: A095379 A160772 A271575 * A062339 A043226 A044006

Adjacent sequences:  A039400 A039401 A039402 * A039404 A039405 A039406

KEYWORD

nonn,base,easy

AUTHOR

Olivier Gérard

STATUS

approved

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Last modified September 19 11:06 EDT 2019. Contains 327192 sequences. (Running on oeis4.)