A055239 Numbers which are not divisible by any of their digits in at least one base.

11, 13, 17, 19, 21, 22, 23, 25, 26, 27, 29, 31, 32, 33, 34, 35, 37, 38, 39, 40, 41, 43, 44, 45, 46, 47, 49, 50, 51, 52, 53, 54, 55, 56, 57, 58, 59, 61, 62, 63, 64, 65, 66, 67, 68, 69, 70, 71, 72, 73, 74, 75, 76, 77, 78, 79, 80, 81, 82, 83, 84, 85, 86, 87, 88, 89, 90, 91, 92

Offset

1,1

Comments

It seems likely all integers greater than 120 appear in this sequence

Links

Table of n, a(n) for n=1..69.

Example

9 is excluded because it can be written as 111111111, 1001, 100, 21, 14, 13, 12, 11, 10 or 9 and in every case there is a digit which divides 9; 11 is in the sequence because in base 4 it is written 23 and 11 is not divisible by either 2 or 3

Crossrefs

Cf. A038772, A055238-A055242.

Sequence in context: A124176 A210757 A031979 * A352154 A138708 A061116

Adjacent sequences: A055236 A055237 A055238 * A055240 A055241 A055242

Keyword

base,easy,nonn

Author

Henry Bottomley, May 04 2000

Status

approved