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A057330
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First member of a prime n-tuplet in a 2p-1 progression.
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18
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2, 2, 2, 1531, 1531, 16651, 16651, 15514861, 857095381, 205528443121, 1389122693971, 216857744866621, 758083947856951, 69257563144280941, 69257563144280941
(list; graph; refs; listen; history; internal format)
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OFFSET
| 1,1
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COMMENTS
| Initial terms of A000040, A005382, A057326, A057327, A057328, A057329.
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LINKS
| Dirk Augustin, Smallest existing Cunningham Chain's of given length
Chris Caldwell, The Prime Glossary: Cunningham chain
Index entries for sequences related to primes in arithmetic progressions
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CROSSREFS
| See also A005603. Cf. A179866.
Sequence in context: A102384 A125838 A066736 * A186069 A079243 A073438
Adjacent sequences: A057327 A057328 A057329 * A057331 A057332 A057333
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KEYWORD
| nonn,nice,more
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AUTHOR
| Patrick De Geest (pdg(AT)worldofnumbers.com), Aug 15 2000.
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EXTENSIONS
| More terms from Jean Gaumont (jeangaum87(AT)yahoo.com), Apr 16 2006
Offset corrected by Max Alekseyev (maxale(AT)gmail.com), May 07 2009
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