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 A130433 Even pseudoprimes to base 3. 12
 286, 24046, 232726, 1304446, 1707266, 2232026, 3197806, 3922126, 4446982, 5603326, 5886166, 10123366, 10169926, 12304774, 13658086, 45133726, 47766286, 52249654, 62656126, 75421126, 76254046, 91459126, 91612246, 96956926 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 COMMENTS The first 27 terms (halved) are given in Table 1 by Paszkiewicz and Rotkiewicz. - R. J. Mathar, Aug 22 2012 LINKS A. Paszkiewicz and A. Rotkiewicz, On a Problem of H. J. A. Duprac, Tatra Mt. Math. Publ. 32 (2005) 15-32, MR2206908 Eric Weisstein's World of Mathematics, Fermat Pseudoprime. MATHEMATICA Do[ f=PowerMod[ 3, 2n-1, 2n ]; If[ f==1, Print[ 2n ] ], {n, 2, 7000000} ] CROSSREFS Cf. A005935 = Pseudoprimes to base 3. Cf. A006935 = Even pseudoprimes (or primes) to base 2: n divides 2^n - 2, n even. Cf. A090082 = Even pseudoprimes to base 5. Cf. A090083, A090084, A090085. Cf. A130434, A130435, A130436, A130437, A130438, A130439, A130440, A130441, A130442, A130443. Sequence in context: A072817 A117994 A221431 * A140926 A203049 A157997 Adjacent sequences:  A130430 A130431 A130432 * A130434 A130435 A130436 KEYWORD nonn AUTHOR Alexander Adamchuk, May 26 2007, Jun 17 2007 EXTENSIONS More terms from Alexander Adamchuk, Jun 17 2007 STATUS approved

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