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%I #26 Jun 26 2021 15:47:30
%S 1,2,3,4,5,6,8,9,10,11,13,14,15,16,17,18,20,21,22,23,25,26,27,28,29,
%T 30,32,33,34,35,37,38,39,40,41,42,44,45,46,47,49,50,51,52,53,54,56,57,
%U 58,59,61,62,63,64,65,66,68,69,70,71,73,74,75,76,77,78,80,81,82,83
%N Numbers whose base-12 representation has the same number of 0's and 7's.
%H David A. Corneth, <a href="/A039216/b039216.txt">Table of n, a(n) for n = 1..10000</a>
%o (PARI) f(n, b, d)=#select(x->x==d, digits(n, b));
%o for(n=1, 110, if (f(n, 12, 0)==f(n, 12, 7), print1(n, ", ")));\\ _Petros Hadjicostas_, Jul 08 2020
%o (PARI) is(n) = {my(d = digits(n, 12), v = vector(12)); for(i = 1, #d, v[d[i]+1]++); v[1]==v[8]} \\ _David A. Corneth_, Jul 09 2020
%K nonn,base,easy
%O 1,2
%A _Olivier Gérard_
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