login
This site is supported by donations to The OEIS Foundation.

 

Logo


Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A030463 Previous palindromic prime concatenated with this palindromic prime is prime. 0
3, 32323, 33533, 37573, 38083, 79397, 1123211, 1126211, 1163611, 1180811, 1268621, 1276721, 1317131, 1338331, 1447441, 1550551, 1565651, 1609061, 1764671, 1829281, 1895981, 3236323, 3563653, 3627263, 7065607, 7087807 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,1

LINKS

Table of n, a(n) for n=0..25.

MATHEMATICA

palQ[n_]:=Module[{idn=IntegerDigits[n]}, idn==Reverse[idn]]; Transpose[ Select[ Partition[Select[Prime[Range[500000]], palQ], 2, 1], PrimeQ[ FromDigits[ Flatten[IntegerDigits/@#]]]&]][[2]] (* Harvey P. Dale, Dec 25 2012 *)

CROSSREFS

Sequence in context: A003839 A297023 A175875 * A086509 A068161 A116313

Adjacent sequences:  A030460 A030461 A030462 * A030464 A030465 A030466

KEYWORD

nonn,base

AUTHOR

Patrick De Geest

STATUS

approved

Lookup | Welcome | Wiki | Register | Music | Plot 2 | Demos | Index | Browse | More | WebCam
Contribute new seq. or comment | Format | Style Sheet | Transforms | Superseeker | Recent | More pages
The OEIS Community | Maintained by The OEIS Foundation Inc.

License Agreements, Terms of Use, Privacy Policy .

Last modified July 23 00:51 EDT 2018. Contains 312919 sequences. (Running on oeis4.)