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A039421 Numbers n such that representation in base 10 has same nonzero number of 3's and 8's. 1
38, 83, 138, 183, 238, 283, 308, 318, 328, 348, 358, 368, 378, 380, 381, 382, 384, 385, 386, 387, 389, 398, 438, 483, 538, 583, 638, 683, 738, 783, 803, 813, 823, 830, 831, 832, 834, 835, 836, 837, 839, 843, 853, 863, 873, 893, 938, 983, 1038, 1083 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

LINKS

Iain Fox, Table of n, a(n) for n = 1..10000

MATHEMATICA

Select[Range[1000], DigitCount[#, 10, 3] == DigitCount[#, 10, 8] > 0 &] (* Wesley Ivan Hurt, Nov 21 2017 *)

PROG

(PARI) is(n) = { my(d = digits(n), i = 0, j = 0); for(x=1, length(d), if(d[x] == 3, i++, if(d[x] == 8, j++))); return(i==j && i!=0); } \\ Iain Fox, Nov 21 2017

CROSSREFS

Sequence in context: A160846 A219999 A219997 * A043244 A044024 A133529

Adjacent sequences:  A039418 A039419 A039420 * A039422 A039423 A039424

KEYWORD

nonn,base,easy

AUTHOR

Olivier Gérard

STATUS

approved

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Last modified November 13 12:45 EST 2019. Contains 329094 sequences. (Running on oeis4.)