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Search: id:A116892
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| A116892 |
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Values of GCD(n!+1,n^n+1), when greater than 1. |
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+0
4
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| 2, 7, 47, 79, 103, 127, 191, 199, 263, 367, 383, 431, 479, 503, 599, 607, 631, 727, 743, 823, 839, 863, 887, 991, 1087, 1151, 1319, 1367, 1423, 1487, 1511, 1583, 1663, 1783, 1823, 1871, 1951, 2039, 2063, 2111, 2143, 2287, 2311, 2383, 2423, 2447, 2503, 2551
(list; graph; listen)
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OFFSET
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1,1
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COMMENT
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Apart from the initial term (2) and few exceptional values (A116894) this sequence seems to coincide with A067658. The values of n for which the terms of this series are attained are in A116893.
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EXAMPLE
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GCD(1!+1,1^1+1)=2 gives the first term, GCD(3!+1,3^3+1)=GCD(7,28)=7 gives the second and so on.
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MATHEMATICA
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f[n_] := GCD[n! + 1, n^n + 1]; t = Array[f, 1295]; Rest@ Union@ t (from Robert G. Wilson v (rgwv(at)rgwv.com), Mar 09 2006)
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CROSSREFS
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Cf. A014566, A038507, A067658, A116891, A116893, A116894.
Sequence in context: A111842 A027458 A062632 this_sequence A054555 A072287 A091117
Adjacent sequences: A116889 A116890 A116891 this_sequence A116893 A116894 A116895
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KEYWORD
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easy,nonn
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AUTHOR
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Giovanni Resta (g.resta(AT)iit.cnr.it), Mar 01 2006
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EXTENSIONS
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Entries checked by Robert G. Wilson v (rgwv(at)rgwv.com), Mar 09 2006.
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