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Search: id:A074380
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| A074380 |
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Sarrus numbers n (A001567) which satisfy mu(n) = -1 and which are not Super-Poulet numbers (A050217). |
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+0
1
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| 561, 645, 1105, 1729, 1905, 2465, 2821, 4371, 6601, 8481, 8911, 10585, 12801, 13741, 13981, 15841, 16705, 25761, 29341, 30121, 30889, 33153, 34945, 41665, 46657, 52633, 57421, 68101, 74665, 83665, 87249, 88561, 91001, 93961, 113201
(list; graph; listen)
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OFFSET
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1,1
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COMMENT
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Some of these are Charmichael numbers (A002997) (1105, 1729, ...).
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EXAMPLE
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561 = 3 * 11 * 17, 645 = 3 * 5 * 43, 1105 = 5 * 13 * 17, ...
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MATHEMATICA
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Select[ Range[115000], !PrimeQ[ # ] && OddQ[ # ] && PowerMod[2, # - 1, # ] == 1 && Union[ PowerMod[2, Drop[Divisors[ # ], 1], # ]] != {2} && MoebiusMu[ # ] != 1 &]
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CROSSREFS
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Cf. A001567, A050217, A002997.
Sequence in context: A013487 A104590 A080747 this_sequence A085999 A137198 A141705
Adjacent sequences: A074377 A074378 A074379 this_sequence A074381 A074382 A074383
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KEYWORD
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nonn
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AUTHOR
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Jani Melik (jani_melik(AT)hotmail.com), Sep 24 2002
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EXTENSIONS
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Edited and extended by Robert G. Wilson v (rgwv(AT)rgwv.com), Oct 03 2002
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