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A037343 Numbers whose base-2 and base-9 expansions have no digits in common. 1
2, 3, 4, 5, 6, 7, 8, 20, 21, 22, 23, 24, 25, 26, 29, 30, 31, 32, 33, 34, 35, 38, 39, 40, 41, 42, 43, 44, 47, 48, 49, 50, 51, 52, 53, 56, 57, 58, 59, 60, 61, 62, 63, 65, 66, 67, 68, 69, 70, 71, 74, 75, 76, 77, 78, 79, 80, 182, 183, 184, 185, 186 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

LINKS

Vincenzo Librandi, Table of n, a(n) for n = 1..1000

MATHEMATICA

Select[Range[200], Intersection[IntegerDigits[#, 2], IntegerDigits[#, 9]]=={}&] (* Vincenzo Librandi, Jun 07 2012 *)

PROG

(PARI) isok(k) = #setintersect(Set(digits(k, 2)), Set(digits(k, 9))) == 0; \\ Michel Marcus, Apr 14 2021

CROSSREFS

Cf. A007088 (base 2), A007095 (base 9).

Sequence in context: A103205 A039127 A024650 * A236836 A134942 A215888

Adjacent sequences:  A037340 A037341 A037342 * A037344 A037345 A037346

KEYWORD

nonn,base

AUTHOR

Clark Kimberling

STATUS

approved

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Last modified October 25 05:57 EDT 2021. Contains 348239 sequences. (Running on oeis4.)