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Search: id:A055201
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| 1, 2, 3, 4, 5, 6, 7, 8, 9, 11, 12, 13, 15, 17, 18, 22, 23, 24, 29, 36, 37, 40, 53, 55, 59, 60, 61, 62, 63, 68, 69, 74, 83, 86, 93, 97, 107, 109, 115, 116, 117, 118, 123, 128, 129, 139, 142, 147, 153, 154, 157, 158, 162, 167, 170, 175, 179, 181, 182, 183, 193, 194, 196
(list; graph; listen)
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OFFSET
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1,2
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COMMENT
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From a question by Leo Moser, s=1; Do[s=s+EulerPhi[n]; If[PrimeQ[s],Print[n]],{n,1,100}]
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REFERENCES
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Martin Gardner, "The Last Recreations," Chapter entitled "Strong Laws of Small Primes," Copernicus, Springer-Verlag, NY 1997, page 199.
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CROSSREFS
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Cf. A005728.
Sequence in context: A002244 A037173 A091897 this_sequence A072303 A081061 A141807
Adjacent sequences: A055198 A055199 A055200 this_sequence A055202 A055203 A055204
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KEYWORD
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easy,nonn
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AUTHOR
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Robert G. Wilson v (rgwv(AT)rgwv.com), Jul 04 2000
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