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Search: id:A002345
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| A002345 |
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Numbers y such that p = x^2 + 7y^2, with prime p = A033207(n).
(Formerly M0197 N0074)
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+0
3
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| 1, 1, 1, 2, 2, 1, 2, 3, 1, 3, 1, 2, 4, 3, 4, 2, 1, 3, 5, 5, 4, 2, 5, 4, 5, 1, 6, 4, 2, 1, 4, 7, 7, 6, 7, 2, 4, 6, 5, 7, 8, 8, 3, 7, 1, 5, 6, 3, 2, 8, 9, 7, 6, 8, 9, 4, 2, 5, 8, 1, 10, 10, 3, 7, 5, 2, 8, 10, 9, 7
(list; graph; listen)
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OFFSET
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1,4
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REFERENCES
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A. J. C. Cunningham, Quadratic Partitions. Hodgson, London, 1904, p. 1.
D. H. Lehmer, Guide to Tables in the Theory of Numbers. Bulletin No. 105, National Research Council, Washington, DC, 1941, p. 55.
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LINKS
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T. D. Noe, Table of n, a(n) for n=1..1000
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CROSSREFS
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Cf. A002344.
Adjacent sequences: A002342 A002343 A002344 this_sequence A002346 A002347 A002348
Sequence in context: A075445 A023572 A077766 this_sequence A071694 A072781 A046923
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KEYWORD
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nonn
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AUTHOR
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njas
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