A039223 - OEIS

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A039223

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

0

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