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Search: id:A014556
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| A014556 |
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Euler's "Lucky" numbers: n such that m^2-m+n is prime for m=0..n-1. |
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+0
7
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OFFSET
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0,1
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REFERENCES
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J.-M. De Koninck, Ces nombres qui nous fascinent, Entry 41, p. 16, Ellipses, Paris 2008.
F. Le Lionnais, Les Nombres Remarquables. Paris: Hermann, pp. 88 and 144, 1983.
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LINKS
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Eric Weisstein's World of Mathematics, Link to a section of The World of Mathematics.
Eric Weisstein's World of Mathematics, Link to a section of The World of Mathematics.
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FORMULA
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a(n)=(A003173(n+3)+1)/4. [From M. F. Hasler (MHasler(AT)univ-ag.fr), Nov 03 2008]
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CROSSREFS
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Cf. A000926, A092749.
Cf. A117530, A117531.
Sequence in context: A073021 A079370 A014210 this_sequence A062737 A085613 A082605
Adjacent sequences: A014553 A014554 A014555 this_sequence A014557 A014558 A014559
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KEYWORD
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nonn,fini,full,nice
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AUTHOR
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Eric Weisstein (eric(AT)weisstein.com)
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