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Search: id:A129742
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| A129742 |
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Numbers of the form: a(n)=((Prime[n] - 1)! - (Prime[n] - 1))/(2*Prime[n]). |
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+0
1
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| 0, 0, 2, 51, 164945, 18423138, 615376173176, 168483518571789, 24434798429947993043, 5256695596753687250025931034, 4278271932454694494134007741935
(list; graph; listen)
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OFFSET
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1,3
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COMMENT
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From the proof of Sir John Wilson's theorem:
numbers of sets of stellated p-gons.
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REFERENCES
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G. E. Andrews, Number Theory, 1971, Dover Publications New York, p 39.
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FORMULA
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a(n)=((Prime[n] - 1)! - (Prime[n] - 1))/(2*Prime[n]).
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MATHEMATICA
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f[n_] = ((Prime[n] - 1)! - (Prime[n] - 1))/(2*Prime[n]); Table[f[n], {n, 1, 20}]
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CROSSREFS
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Adjacent sequences: A129739 A129740 A129741 this_sequence A129743 A129744 A129745
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KEYWORD
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nonn,new
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AUTHOR
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Roger L. Bagula and Gary W. Adamson (rlbagulatftn(AT)yahoo.com), Aug 25 2008
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