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A263315 Numbers whose decimal representation contains at least two digits such that no digit is divisible by any other digit. 1
23, 25, 27, 29, 32, 34, 35, 37, 38, 43, 45, 46, 47, 49, 52, 53, 54, 56, 57, 58, 59, 64, 65, 67, 68, 69, 72, 73, 74, 75, 76, 78, 79, 83, 85, 86, 87, 89, 92, 94, 95, 96, 97, 98, 235, 237, 253, 257, 259, 273, 275, 279, 295, 297, 325, 327, 345, 347, 352, 354, 357 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

This sequence is finite. Digits 0 or 1 do not occur.

Digits must be mutually coprime and thus none can be repeated. The number 1 is coprime to all numbers thus it is left out of consideration. - Michael De Vlieger, Mar 25 2017

LINKS

Alois P. Heinz, Table of n, a(n) for n = 1..752

EXAMPLE

From Michael De Vlieger, Mar 25 2017: (Start)

29 is in the sequence because the digits 2 and 9 are coprime and not equal to 1.

325 is in the sequence because digits 3, 2, and 5 are mutually coprime and none are equal to 1. (End)

MATHEMATICA

Select[Range@ 360, CoprimeQ @@ # && ! MemberQ[#, 1] &@ IntegerDigits@ # &] (* Michael De Vlieger, Mar 25 2017 *)

CROSSREFS

Cf. A263314.

Sequence in context: A042102 A156964 A147624 * A240913 A095251 A242942

Adjacent sequences:  A263312 A263313 A263314 * A263316 A263317 A263318

KEYWORD

nonn,base,fini,full

AUTHOR

Giovanni Teofilatto, Oct 14 2015

STATUS

approved

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Last modified April 24 18:03 EDT 2019. Contains 322430 sequences. (Running on oeis4.)