id:A088271 - OEIS Search Results

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Palindromic primes that yield a prime when sandwiched between two 7's. (Prefixing and suffixing a 'seven' on both sides yields another pal prime).

+0
4

2, 5, 131, 191, 797, 11411, 15551, 30203, 31013, 32423, 36263, 36563, 38183, 39293, 72227, 74747, 77477, 94349, 94949, 1003001, 1055501, 1074701, 1085801, 1120211, 1123211, 1153511, 1178711, 1183811, 1221221, 1311131, 1317131, 1363631 (list; graph; listen)

	OFFSET	`0,1`
	EXAMPLE	`191 is a member as 71917 is also a prime.`
	CROSSREFS	`Cf. A088269, A088270, A088272.` `Sequence in context: A092922 A093865 A139484 this_sequence A130412 A069139 A062611` `Adjacent sequences: A088268 A088269 A088270 this_sequence A088272 A088273 A088274`
	KEYWORD	`base,nonn`
	AUTHOR	`Amarnath Murthy (amarnath_murthy(AT)yahoo.com), Sep 28 2003`
	EXTENSIONS	`More terms from David Wasserman (wasserma(AT)spawar.navy.mil), Jul 28 2005`

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Last modified September 7 23:08 EDT 2008. Contains 143486 sequences.

AT&T Labs Research