A039216 Numbers whose base-12 representation has the same number of 0's and 7'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, 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

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 A353202

Adjacent sequences: A039213 A039214 A039215 * A039217 A039218 A039219

Keyword

nonn,base,easy

Author

Olivier Gérard

Status

approved