A039223 - OEIS

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A039223

Numbers whose base-12 representation has the same number of 1's and 5's.

0, 2, 3, 4, 6, 7, 8, 9, 10, 11, 17, 24, 26, 27, 28, 30, 31, 32, 33, 34, 35, 36, 38, 39, 40, 42, 43, 44, 45, 46, 47, 48, 50, 51, 52, 54, 55, 56, 57, 58, 59, 61, 72, 74, 75, 76, 78, 79, 80, 81, 82, 83, 84, 86, 87, 88, 90, 91, 92, 93, 94, 95, 96, 98, 99, 100, 102, 103, 104

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

OFFSET

1,2

LINKS

Table of n, a(n) for n=1..69.

PROG

(PARI) f(n, b, d) = #select(x->x==d, digits(n, b));

select(n->f(n, 12, 1)==f(n, 12, 5), [0..110]) \\ Joerg Arndt and Petros Hadjicostas, Jul 09 2020

CROSSREFS

Sequence in context: A014155 A263579 A166527 * A028392 A175970 A286689

Adjacent sequences: A039220 A039221 A039222 * A039224 A039225 A039226

KEYWORD

nonn,base,easy

AUTHOR

Olivier Gérard

STATUS

approved