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A343715 Palindromic primes of the form p//q//reverse(p), where p, q, and reverse(p) are primes. 1
353, 373, 727, 757, 11311, 13331, 31013, 31513, 33533, 37273, 37573, 39293, 71317, 71917, 73237, 77977, 79397, 97379, 97579, 1175711, 1178711, 1317131, 1335331, 1338331, 1513151, 1572751, 1737371, 1793971, 1917191, 1993991, 1995991, 3103013, 3106013, 3127213 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

If reverse(p) were allowed to be nonprime, the result would be sequence A343714, which includes such terms as 19391.

LINKS

Table of n, a(n) for n=1..34.

EXAMPLE

353 is a term because it is a palindromic prime (A002385) and is the concatenation of 3 (a prime), 5 (a palindromic prime), and 3 (the reverse of 3, and also a prime).

31513 is a term in two ways: as the concatenation 3//151//3 and as the concatenation 31//5//13.

7392937 is a term in three ways: 7//39293//7, 73//929//37, and 739//2//937.

CROSSREFS

Cf. A002385, A045336, A177678, A343714.

Sequence in context: A245440 A145023 A343714 * A177678 A058375 A059635

Adjacent sequences:  A343712 A343713 A343714 * A343716 A343717 A343718

KEYWORD

nonn,base

AUTHOR

Jon E. Schoenfield, May 08 2021

STATUS

approved

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Last modified July 28 23:26 EDT 2021. Contains 346340 sequences. (Running on oeis4.)