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Search: id:A108162
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| A108162 |
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Least even pseudoprime > p to base p, where p = Prime[n]. |
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| 161038, 286, 124, 16806, 70, 244, 1228, 906, 154, 52, 66, 66, 344, 526974, 506, 286, 946, 130, 154, 370, 276, 2626, 1558, 19126, 176, 190, 946, 742, 186, 176, 3486, 190, 148, 246, 412, 10930, 186, 186, 3818, 14444, 1246, 316, 286, 276, 532, 426, 310, 246
(list; graph; listen)
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OFFSET
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1,1
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COMMENT
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Some numbers appear as a multiple terms in a(n). For example, a(n) = 946 for n = {17,27,64,66,73,75,97,113,114,117,128,139,143,152,153,155} for corresponding prime p = {59,103,311,317,367,379,509,617,619,643,719,797,823,881,883,907}. There are some twin terms such that a(n) = a(n+1). For example, a(11) = a(12) = 66, a(37) = a(38) = 186, a(113) = a(114) = 946, a(152) = a(153) = 946, a(227) = a(228) = 2626.
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LINKS
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Eric Weisstein's World of Mathematics, Fermat Pseudoprime.
Index entries for sequences related to pseudoprimes
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CROSSREFS
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Cf. A006935 = Even pseudoprimes (or primes) to base 2: n divides 2^n - 2, n even. Cf. A130433, A090082, A130434, A090084, A130435, A130436, A130437, A130438, A130439, A130440, A130441, A130442, A130443.
Sequence in context: A141816 A097626 A115536 this_sequence A038681 A017285 A017393
Adjacent sequences: A108159 A108160 A108161 this_sequence A108163 A108164 A108165
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KEYWORD
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nonn
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AUTHOR
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Alexander Adamchuk (alex(AT)kolmogorov.com), May 26 2007
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