|
Search: id:A114018
|
|
|
| A114018 |
|
Least n-digit prime whose digit reversal is also prime. |
|
+0
4
|
|
| 2, 11, 101, 1009, 10007, 100049, 1000033, 10000169, 100000007, 1000000007, 10000000207, 100000000237, 1000000000091, 10000000000313, 100000000000261, 1000000000000273, 10000000000000079, 100000000000000049
(list; graph; listen)
|
|
|
OFFSET
|
1,1
|
|
|
MATHEMATICA
|
f[n_] := Block[{k = 10^(n - 1)}, While[ !PrimeQ[k] || !PrimeQ[FromDigits@Reverse@IntegerDigits@k], k++ ]; k]; Array[f, 19] (* Robert G. Wilson v *)
|
|
CROSSREFS
|
Sequence in context: A115062 A062397 A003617 this_sequence A089770 A069663 A121419
Adjacent sequences: A114015 A114016 A114017 this_sequence A114019 A114020 A114021
|
|
KEYWORD
|
base,nonn
|
|
AUTHOR
|
Amarnath Murthy (amarnath_murthy(AT)yahoo.com), Nov 12 2005
|
|
EXTENSIONS
|
More terms from Robert G. Wilson v (rgwv(at)rgwv.com), Nov 19 2005
|
|
|
Search completed in 0.002 seconds
|
