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A039216
Numbers whose base-12 representation has the same number of 0's and 7's.
2
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, 30, 32, 33, 34, 35, 37, 38, 39, 40, 41, 42, 44, 45, 46, 47, 49, 50, 51, 52, 53, 54, 56, 57, 58, 59, 61, 62, 63, 64, 65, 66, 68, 69, 70, 71, 73, 74, 75, 76, 77, 78, 80, 81, 82, 83
OFFSET
1,2
LINKS
PROG
(PARI) f(n, b, d)=#select(x->x==d, digits(n, b));
for(n=1, 110, if (f(n, 12, 0)==f(n, 12, 7), print1(n, ", "))); \\ Petros Hadjicostas, Jul 08 2020
(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
CROSSREFS
Sequence in context: A302594 A055492 A005459 * A336109 A091208 A353202
KEYWORD
nonn,base,easy
STATUS
approved