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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
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0, 0, 2, 51, 164945, 18423138, 615376173176, 168483518571789, 24434798429947993043, 5256695596753687250025931034, 4278271932454694494134007741935
(list; graph; refs; listen; history; internal format)
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OFFSET
| 1,3
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COMMENTS
| From the proof of Sir John Wilson's theorem:
numbers of sets of stellated p-gons.
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REFERENCES
| G. E. Andrews, Number Theory, 1971, Dover Publications New York, p 39.
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FORMULA
| a(n)=((Prime[n] - 1)! - (Prime[n] - 1))/(2*Prime[n]).
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MATHEMATICA
| f[n_] = ((Prime[n] - 1)! - (Prime[n] - 1))/(2*Prime[n]); Table[f[n], {n, 1, 20}]
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CROSSREFS
| Sequence in context: A099368 A132492 A030264 * A105647 A053455 A080921
Adjacent sequences: A129739 A129740 A129741 * A129743 A129744 A129745
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KEYWORD
| nonn
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AUTHOR
| Roger L. Bagula and Gary W. Adamson (rlbagulatftn(AT)yahoo.com), Aug 25 2008
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