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A211457
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Largest number b for which A181780(n) is a Fermat pseudoprime.
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5
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11, 13, 18, 25, 23, 29, 25, 37, 31, 35, 29, 34, 37, 55, 57, 49, 47, 51, 49, 49, 43, 81, 59, 88, 61, 56, 89, 97, 73, 81, 91, 109, 69, 118, 83, 25, 68, 85, 81, 125, 109, 95, 131, 133, 97, 137, 145, 67, 94, 107, 139, 142, 150, 134, 165, 151, 113, 119, 121, 179
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OFFSET
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1,1
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COMMENTS
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That is, the largest b for which b^(s-1) = 1 (mod s), where s is in A181780.
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LINKS
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T. D. Noe, Table of n, a(n) for n = 1..10000
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MATHEMATICA
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t = {}; n = 1; While[Length[t] < 100, n++; If[! PrimeQ[n], s = Select[Range[2, n-2], PowerMod[#, n-1, n] == 1 &]; If[s != {}, AppendTo[t, {n, Length[s], s}]]]]; Last/@Transpose[t][[3]]
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CROSSREFS
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Cf. A181780, A211455, A211456, A211458.
Sequence in context: A098423 A178339 A088561 * A154523 A107932 A143365
Adjacent sequences: A211454 A211455 A211456 * A211458 A211459 A211460
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KEYWORD
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nonn
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AUTHOR
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T. D. Noe, Apr 13 2012
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STATUS
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approved
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