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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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1
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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; refs; listen; history; internal format)
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OFFSET
| 1,1
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REFERENCES
| 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
| Equals 3*A105876(n) - 2.
Sequence in context: A126194 A068229 A071696 * A191118 A169605 A141338
Adjacent sequences: A114561 A114562 A114563 * A114565 A114566 A114567
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KEYWORD
| nonn
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AUTHOR
| R. K. Guy, rkg(AT)cpsc.ucalgary.ca, Feb 11 2006
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