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A002347 Consider all primes of form p = (x^2 + 11y^2 )/4; sequence gives values of y.
(Formerly M0151 N0061)

%I M0151 N0061

%S 1,1,2,1,3,3,2,4,1,3,5,5,3,6,1,7,3,6,5,3,7,6,9,9,5,8,4,10,9,7,3,11,3,

%T 9,1,11,12,8,10,12,9,11,5,9,13,3,6,1,13,3,2,10,8,15,15,7,9,13,1,15,14,

%U 15,15,5,3,15,12,4,17,9,15,11,15,14,5,6,18,2,16,7,13,17,11,18

%N Consider all primes of form p = (x^2 + 11y^2 )/4; sequence gives values of y.

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

%Y Cf. A002346, A056874.

%K nonn

%O 3,3

%A _N. J. A. Sloane_.

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Last modified October 20 22:44 EDT 2019. Contains 328291 sequences. (Running on oeis4.)