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

Author

Giovanni Teofilatto, Oct 14 2015

Keywords

• nonn
• base
• fini
• full

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

Examples

			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)
		

Links

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

Crossrefs

Cf. A263314.

Programs

Mathematica

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