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Search: id:A128150
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| A128150 |
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Least k such that n^k (mod k) = (n-1)^2, or 0 if no such k exists. |
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+0
22
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| 0, 41459, 35, 9569200211, 2673413, 10596486211, 1885511821439, 235, 12722173, 1971782729, 133617287, 14873, 1465, 1606870609, 4247, 129015968122421, 526673, 835, 1079115301, 12148589879, 12351683
(list; graph; listen)
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OFFSET
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2,2
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EXAMPLE
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a(2) = A036236(1) = 0,
a(3) = A078457(2^2) = 41459,
a(4) = A119678(3^2) = 35,
a(5) = A119679(4^2) = 9569200211,
a(6) = A127816(5^2) = 2673413,
a(7) = A119715(6^2) = 10596486211,
a(8) = A119714(7^2) = 1885511821439,
a(9) = A127817(8^2) = 235,
a(10) = A127818(9^2) = 12722173,
a(11) = A127819(100) = 1971782729,
a(12) = A127820(121) = 133617287,
a(13) = A127821(144) = 14873,
a(14) = A128154(169) = 1465,
a(15) = A128155(196) = 1606870609,
a(16) = A128156(225) = 4247,
a(17) = A128157(256) = 129015968122421,
a(18) = A128158(289) = 526673,
a(19) = A128159(324) = 835,
a(20) = A128160(361) = 1079115301,
a(21) = A128361(400) = 12148589879,
a(22) = A128362(441) = 12351683,
a(23) = A128363(484) > 18650099999,
a(24) = A128364(529) = 6385,
a(25) = A128365(576) = 5809,
a(26) = A128366(625) > 10909999999,
a(27) = A128367(676) = 299651,
a(28) = A128368(729) > 5000000000,
a(29) = A128369(784) = 2645,
a(30) = A128370(841) > 5100000000,
a(31) = A128371(900) = 1051624907,
a(32) = A128372(961) = 725521, etc.
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CROSSREFS
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Cf. A128148, A128149, A128172, A036236, A078457, A119678, A119679, A127816, A119715, A119714, A127817, A127818, A127819, A127820, A127821, A128154, A128155, A128156, A128157, A128158, A128159, A128160, A128361, A128362, A128363, A128364, A128365, A128366, A128367, A128368, A128369, A128370, A128371, A128372.
Sequence in context: A141711 A074379 A027577 this_sequence A165114 A002879 A163392
Adjacent sequences: A128147 A128148 A128149 this_sequence A128151 A128152 A128153
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KEYWORD
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hard,more,nonn
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AUTHOR
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Alexander Adamchuk (alex(AT)kolmogorov.com), Feb 16 2007, May 06 2007
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EXTENSIONS
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More terms from Alexander Adamchuk (alex(AT)kolmogorov.com), Dec 24 2007
a(13), a(14), a(16), a(18), a(19), a(24), a(25), a(27), a(29) & a(32). - Alexander Adamchuk (alex(AT)kolmogorov.com), Feb 17 2008
Corrected A-number in cross-reference. Copied a(8) to a(16) from other sequences. - R. J. Mathar (mathar(AT)strw.leidenuniv.nl), Aug 08 2009
Edited by Robert G. Wilson v (rgwv@rgwv.com), Aug 20 2009
a(17) from Joe Crump (joecr@carolina.rr.com), Sep 17 2009.
More terms and general editing from Robert G. Wilson v (rgwv(AT)rgwv.com), Sep 30 2009
a(20), a(21) & a(22) from Robert G. Wilson v (rgwv(AT)rgwv.com), Oct 17 2009
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