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Search: id:A114564
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| A114564 |
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Numbers of the form n=12s+7, where q=4s+3 is a prime for which the order of 2 is either q-1 or (q-1)/2. |
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+0
2
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| 7, 19, 31, 55, 67, 139, 175, 199, 211, 235, 247, 307, 319, 391, 415, 487, 499, 535, 571, 595, 631, 679, 715, 787, 811, 931, 1039, 1075, 1099, 1135, 1147, 1255, 1327, 1387, 1399, 1435, 1459, 1471, 1507, 1567, 1639, 1687, 1759, 1795, 1819, 1855
(list; graph; listen)
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OFFSET
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1,1
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REFERENCES
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L. Heffter, Ueber das Problem der Nachbargebiete, Math. Ann., 38 (1891) 477-508.
G. Ringel, Map Color Theorem, Springer, 1974, p. 6.
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CROSSREFS
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Equals 3*A105876(n) - 2.
Sequence in context: A126194 A068229 A071696 this_sequence A141338 A038869 A053591
Adjacent sequences: A114561 A114562 A114563 this_sequence A114565 A114566 A114567
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KEYWORD
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nonn
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AUTHOR
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R. K. Guy, rkg(AT)cpsc.ucalgary.ca, Feb 11 2006
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