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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 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

LINKS

David A. Corneth, Table of n, a(n) for n = 1..10000

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 A068398

Adjacent sequences:  A039213 A039214 A039215 * A039217 A039218 A039219

KEYWORD

nonn,base,easy

AUTHOR

Olivier Gérard

STATUS

approved

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Last modified December 3 21:17 EST 2021. Contains 349468 sequences. (Running on oeis4.)