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%I M5085 N2201 #23 Feb 14 2021 02:16:15
%S 1,20,74,24,157,124,478,1480,1198,3044,480,184,2351,1720,3282,5728,
%T 2480,1776,10326,9560,8886,9188,11618,23664,16231,23960,11686,9176,
%U 60880,16876,18482,3768,35372,15532,3680,31960,4886,47020,2976,44560
%N Related to representation as sums of squares.
%C This is A225923 without the minus signs. - _Michael Somos_, Aug 09 2018
%D J. W. L. Glaisher, On the representation of a number as sum of 2,4,6,8... squares, Quart. J. Math. 38 (1907), 1-62 (see p. 56).
%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 Masao Koike, <a href="https://oeis.org/A004016/a004016.pdf">Modular forms on non-compact arithmetic triangle groups</a>, Unpublished manuscript [Extensively annotated with OEIS A-numbers by N. J. A. Sloane, Feb 14 2021. I wrote 2005 on the first page but the internal evidence suggests 1997.]
%F a(n) = abs(A225923(n)). - _Michael Somos_, Aug 09 2018
%Y Cf. A225923.
%K nonn
%O 0,2
%A _N. J. A. Sloane_
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