|
Search: id:A116519
|
|
|
| A116519 |
|
Primes which stay prime when the end digits (on both sides) are repeated once. |
|
+0
1
|
|
| 131, 139, 163, 167, 193, 211, 227, 251, 269, 277, 281, 331, 337, 353, 359, 463, 541, 563, 571, 593, 653, 673, 761, 769, 797, 821, 881, 937, 983, 1031, 1093, 1097, 1153, 1279, 1301, 1427, 1429, 1459, 1483, 1549, 1609, 1693, 1783, 1787, 1789, 1879, 1931
(list; graph; listen)
|
|
|
OFFSET
|
1,1
|
|
|
EXAMPLE
|
The derived numbers 11311,11399,11633,11933,22111,22277,...are also primes.
|
|
MATHEMATICA
|
FromDigits /@ Select[IntegerDigits@Prime@Range[400], PrimeQ@FromDigits@Flatten@{First@#, #, Last@#} &] - Giovanni Resta (g.resta(AT)iit.cnr.it), Apr 04 2006
|
|
CROSSREFS
|
Sequence in context: A050671 A095317 A084549 this_sequence A139646 A139970 A039558
Adjacent sequences: A116516 A116517 A116518 this_sequence A116520 A116521 A116522
|
|
KEYWORD
|
nonn
|
|
AUTHOR
|
Lekraj Beedassy (blekraj(AT)yahoo.com), Mar 25 2006
|
|
EXTENSIONS
|
More terms from Giovanni Resta (g.resta(AT)iit.cnr.it), Apr 04 2006
|
|
|
Search completed in 0.002 seconds
|
