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A031487 n-th number k which in base 8 has the same number of 0's as 7's. 0
1, 2, 3, 4, 5, 6, 9, 10, 11, 12, 13, 14, 17, 18, 19, 20, 21, 22, 25, 26, 27, 28, 29, 30, 33, 34, 35, 36, 37, 38, 41, 42, 43, 44, 45, 46, 49, 50, 51, 52, 53, 54, 56, 71, 73, 74, 75, 76, 77, 78, 81, 82, 83, 84, 85, 86, 89, 90, 91, 92, 93, 94, 97 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

LINKS

Table of n, a(n) for n=1..63.

MATHEMATICA

Select[Range[100], DigitCount[#, 8, 0]==DigitCount[#, 8, 7]&] (* Harvey P. Dale, Dec 12 2017 *)

CROSSREFS

Sequence in context: A272574 A039111 A037475 * A047422 A160532 A047305

Adjacent sequences:  A031484 A031485 A031486 * A031488 A031489 A031490

KEYWORD

nonn

AUTHOR

Clark Kimberling

STATUS

approved

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Last modified February 17 15:32 EST 2020. Contains 331998 sequences. (Running on oeis4.)