A002340 - OEIS

%I M3739 N1528 #23 Oct 15 2023 01:41:45

%S 5,4,8,7,6,11,8,9,14,18,13,11,17,16,12,13,14,28,19,14,18,16,27,22,31,

%T 16,17,26,19,34,24,23,22,28,37,41,27,32,21,26,22,23,31,22,44,48,23,29,

%U 39,43,24,38,51,32,26,31,28,29,36,41,27,58,28

%N Numbers x such that p = x^2 - 5y^2, where p == 0, 1, or 4 (mod 5).

%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. A002341.

%K nonn

%O 1,1

%A _N. J. A. Sloane_

%E Corrected and extended by _Sean A. Irvine_, Oct 21 2013

%E Offset corrected by _Mohammed Yaseen_, Jul 24 2023