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A068645 Primes in which a string of 3's is sandwiched between two 1's. +0
7
11, 131, 13331, 1333331, 13333333333333333333333333333333333333333333333333333333333333333333333333333333333333333333331 (list; graph; listen)
OFFSET

0,1

COMMENT

a(5) consists of 93, and a(6) consists of 159 3's sandwiched between two 1's. - Sascha Kurz (sascha.kurz(AT)uni-bayreuth.de), Mar 26 2002

CROSSREFS

Adjacent sequences: A068642 A068643 A068644 this_sequence A068646 A068647 A068648

Sequence in context: A075509 A061113 A101334 this_sequence A097258 A044041 A105280

KEYWORD

base,nonn

AUTHOR

Amarnath Murthy (amarnath_murthy(AT)yahoo.com), Feb 28 2002

EXTENSIONS

More terms from Sascha Kurz (sascha.kurz(AT)uni-bayreuth.de), Mar 26 2002

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Last modified October 7 14:39 EDT 2008. Contains 144666 sequences.


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