A263315 Numbers whose decimal representation contains at least two digits such that no digit is divisible by any other digit.

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

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