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Search: id:A006935
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| A006935 |
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Even pseudoprimes (or primes) to base 2: n divides 2^n - 2, n even.
(Formerly M2190)
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+0
14
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| 2, 161038, 215326, 2568226, 3020626, 7866046, 9115426, 49699666, 143742226, 161292286, 196116194, 209665666, 213388066, 293974066, 336408382, 377994926, 410857426, 665387746, 667363522, 672655726, 760569694, 1066079026, 1105826338
(list; graph; listen)
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OFFSET
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1,1
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COMMENT
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Of course 2 is the only true prime here.
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REFERENCES
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N. J. A. Sloane and Simon Plouffe, The Encyclopedia of Integer Sequences, Academic Press, 1995 (includes this sequence).
N. G. W. H. Beeger, On even numbers m dividing 2^m-2, Amer. Math. Monthly, 58 (1951), 553-555.
A. H. Beiler, Recreations in the Theory of Numbers, Dover, NY, 1964, p. 23.
R. K. Guy, Unsolved Problems in Number Theory, A12.
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LINKS
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T. D. Noe, Table of n, a(n) for n=1..155 (from Pinch)
Eric Weisstein's World of Mathematics, Link to a section of The World of Mathematics.
Index entries for sequences related to pseudoprimes
R. G. E. Pinch, Even Pseudoprimes < 10^12 (FTP)
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CROSSREFS
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Sequence in context: A003840 A122540 A167518 this_sequence A070833 A152475 A124362
Adjacent sequences: A006932 A006933 A006934 this_sequence A006936 A006937 A006938
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KEYWORD
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nonn,nice
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AUTHOR
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N. J. A. Sloane (njas(AT)research.att.com), Rich Schroeppel (rschroe(AT)sandia.gov)
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EXTENSIONS
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More terms from Robert G. Wilson v (rgwv(AT)rgwv.com)
Corrected by T. D. Noe (noe(AT)sspectra.com), May 27 2003
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