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Search: id:A055550
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| A055550 |
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Number of Poulet numbers (or pseudoprimes to base 2, A001567) less than 10^n. |
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+0
1
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| 0, 0, 3, 22, 78, 245, 750, 2057, 5597, 14884, 38975, 101629, 264239
(list; graph; listen)
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OFFSET
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1,3
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REFERENCES
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J.-M. De Koninck, Ces nombres qui nous fascinent, Entry 245, pp 68, Ellipses, Paris 2008. - Lekraj Beedassy (blekraj(AT)yahoo.com), Jul 20 2008
W. F. Galway, "The pseudoprimes below to 2^64", http://oldweb.cecm.sfu.ca/pseudoprime/psp-search-slides.pdf.
W. F. Galway, Database of pseudoprimes up to 10^15, http://oldweb.cecm.sfu.ca/pseudoprime/.
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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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CROSSREFS
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Cf. A001567, A055552.
Sequence in context: A006532 A005288 A143166 this_sequence A075204 A106150 A135836
Adjacent sequences: A055547 A055548 A055549 this_sequence A055551 A055552 A055553
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KEYWORD
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nonn,more
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AUTHOR
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Eric Weisstein (eric(AT)weisstein.com)
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EXTENSIONS
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a(14) and a(15) computed by William F. Galway and communicated by Arthur Livingstone (arthur.livingstone(AT)gmail.com), Apr 10 2007
Edited by N. J. A. Sloane (njas(AT)research.att.com), Feb 01 2009 at the suggestion of Charles Greathouse
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