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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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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; refs; listen; history; internal format)
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OFFSET
| 1,1
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COMMENTS
| Of course 2 is the only true prime here.
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REFERENCES
| 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.
N. J. A. Sloane and Simon Plouffe, The Encyclopedia of Integer Sequences, Academic Press, 1995 (includes this sequence).
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LINKS
| T. D. Noe, Table of n, a(n) for n=1..155 (from Pinch)
R. G. E. Pinch, Even Pseudoprimes < 10^12 (FTP)
Eric Weisstein's World of Mathematics, Link to a section of The World of Mathematics.
Index entries for sequences related to pseudoprimes
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CROSSREFS
| Sequence in context: A122540 A167518 A178168 * A070833 A176584 A152475
Adjacent sequences: A006932 A006933 A006934 * A006936 A006937 A006938
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KEYWORD
| nonn,nice
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AUTHOR
| N. J. A. Sloane (njas(AT)research.att.com), Rich Schroeppel (rschroe(AT)sandia.gov)
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EXTENSIONS
| 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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