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A000355 Primes == 3, 9, 11 (mod 20) such that 2p+1 is also prime. +0
1
3, 11, 23, 29, 83, 89, 131, 191, 251, 431, 443, 491, 509, 683, 743, 809, 911, 1031, 1049, 1103, 1223, 1229, 1289, 1409, 1451, 1511, 1583, 1811, 1889, 1931 (list; graph; listen)
OFFSET

1,1

REFERENCES

R. A. J. Matthews, Maximally periodic reciprocals, Bull. Instititute of Mathematics and Its Applications, vol. 28, p. 147-148, 1992.

CROSSREFS

Subset of A005384.

Adjacent sequences: A000352 A000353 A000354 this_sequence A000356 A000357 A000358

Sequence in context: A087078 A141226 A049491 this_sequence A100860 A018630 A094379

KEYWORD

nonn

AUTHOR

R. A. J. Matthews [ 100265.3005(AT)compuserve.com ]

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Last modified October 6 16:13 EDT 2008. Contains 144667 sequences.


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