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A002344 Numbers x such that p = x^2 + 7y^2, with prime p = A033207(n).
(Formerly M0930 N0349)
3

%I M0930 N0349 #15 Dec 26 2016 02:11:39

%S 0,2,4,1,3,6,5,2,8,4,10,9,1,8,5,11,12,10,2,4,9,13,6,11,8,16,5,13,17,

%T 18,15,2,4,11,6,19,17,13,16,10,1,3,20,12,22,18,17,22,23,11,2,16,19,13,

%U 8

%N Numbers x such that p = x^2 + 7y^2, with prime p = A033207(n).

%D A. J. C. Cunningham, Quadratic Partitions. Hodgson, London, 1904, p. 1.

%D D. H. Lehmer, Guide to Tables in the Theory of Numbers. Bulletin No. 105, National Research Council, Washington, DC, 1941, p. 55.

%D N. J. A. Sloane, A Handbook of Integer Sequences, Academic Press, 1973 (includes this sequence).

%D N. J. A. Sloane and Simon Plouffe, The Encyclopedia of Integer Sequences, Academic Press, 1995 (includes this sequence).

%H T. D. Noe, <a href="/A002344/b002344.txt">Table of n, a(n) for n = 1..1000</a>

%H A. J. C. Cunningham, <a href="/A002330/a002330.pdf">Quadratic Partitions</a>, Hodgson, London, 1904 [Annotated scans of selected pages]

%Y Cf. A002345.

%K nonn,easy

%O 1,2

%A _N. J. A. Sloane_

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Last modified April 16 08:27 EDT 2024. Contains 371698 sequences. (Running on oeis4.)