A166733 - OEIS

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A166733

Numbers n with the property that the concatenation of the trivial divisors of n (i.e., 1 and n) is a prime.

0

3, 7, 9, 13, 27, 31, 37, 39, 49, 51, 57, 63, 67, 73, 79, 81, 91, 93, 97, 99, 103, 109, 117, 123, 129, 151, 153, 163, 171, 181, 187, 193, 201, 213, 217, 223, 229, 231, 237, 249, 259, 277, 279, 283, 289, 291, 297, 301, 303, 307, 319, 321, 327, 361, 367, 373, 381

(list; graph; refs; listen; history; text; internal format)

OFFSET

1,1

COMMENTS

Essentially the same as A032664. - R. J. Mathar, Oct 23 2009

LINKS

Table of n, a(n) for n=1..57.

EXAMPLE

3 -> 13; 7 -> 17; 9 -> 19; 13 -> 113.

CROSSREFS

Sequence in context: A325556 A174840 A032664 * A172987 A118556 A279617

Adjacent sequences: A166730 A166731 A166732 * A166734 A166735 A166736

KEYWORD

nonn,base

AUTHOR

Juri-Stepan Gerasimov, Oct 20 2009

EXTENSIONS

Edited by Charles R Greathouse IV, Apr 24 2010

STATUS

approved