|
| |
|
|
A100553
|
|
Prime numbers (including 1) with a power of 2 digits, all digits from the set {1,2,3,5,7}, such that each half of the number is already in this sequence.
|
|
0
| |
|
|
1, 2, 3, 5, 7, 11, 13, 17, 23, 31, 37, 53, 71, 73, 1117, 1123, 1153, 1171, 1373, 1723, 1753, 2311, 2371, 3137, 5323, 7331, 11172311, 11175323, 11231723, 11531123, 11711123, 11711753, 13737331, 17231171, 17532311, 23111723, 23711153
(list; graph; refs; listen; history; internal format)
|
|
|
|
OFFSET
| 0,2
|
|
|
COMMENTS
| The sequence would be tragically short were the '1' not there.
|
|
|
EXAMPLE
| 11231723 is there because it is prime and 1123 and 1723 are there.
|
|
|
CROSSREFS
| Sequence in context: A190222 A012884 A068669 * A175584 A152245 A007693
Adjacent sequences: A100550 A100551 A100552 * A100554 A100555 A100556
|
|
|
KEYWORD
| nonn,base
|
|
|
AUTHOR
| Roger Bagula (rlbagulatftn(AT)yahoo.com), Nov 27 2004
|
|
|
EXTENSIONS
| Edited by N. J. A. Sloane (njas(AT)research.att.com), Noc 10 2005
|
| |
|
|
