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 A130441 Even pseudoprimes to base 37. 13
 4, 6, 12, 18, 28, 36, 66, 246, 268, 396, 1476, 1876, 2044, 2556, 2706, 3556, 5986, 9514, 11034, 16236, 17466, 25626, 31956, 34716, 120786, 149076, 153756, 246484, 259588, 281886, 283276, 483636, 552926, 559966, 623566, 670186, 721846, 846076, 1050666 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 LINKS Robert G. Wilson v, Table of n, a(n) for n = 1..243. Eric Weisstein's World of Mathematics, Fermat Pseudoprime. MATHEMATICA Do[ f=PowerMod[ 37, 2n-1, 2n ]; If[ f==1, Print[ 2n ] ], {n, 2, 500000} ] lst = {}; Do[ If[ PowerMod[37, 2n - 1, 2n] == 1, AppendTo[lst, 2n]], {n, 2, 2^31}]; lst (* Robert G. Wilson v, Jun 01 2007 *) CROSSREFS Cf. A020165, A006935, A130433, A090082, A090083, A090084, A090085, A130434, A130435, A130436, A130437, A130438, A130439, A130440, A130442, A130443. Sequence in context: A154965 A249630 A109290 * A068570 A074998 A061715 Adjacent sequences:  A130438 A130439 A130440 * A130442 A130443 A130444 KEYWORD nonn AUTHOR Alexander Adamchuk, May 26 2007 STATUS approved

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Last modified August 3 02:48 EDT 2021. Contains 346435 sequences. (Running on oeis4.)