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a(n) = Glaisher's function beta(2n+1).
0, 16, -64, 32, 128, -208, 448, -416, -896, 1104, -768, 2144, 1280, -2912, -1344, -4992, 4480, 3264, 5312, 2272, -13056, 1456, -3136, 12480, -3584, -8416, -3904, -19168, 35456, 12272, 8128, -6240, -6400, -18672, -22784, 7456, -36224, 22256
0,2
J. W. L. Glaisher, <a href="https://books.google.com/books?id=bLs9AQAAMAAJ&pg=RA1-PA1">On the representations of a number as the sum of two, four, six, eight, ten, and twelve squares</a>, Quart. J. Math. 38 (1907), 1-62 (see p. 56).
<a href="/index/Ge#Glaisher">Index entries for sequences mentioned by Glaisher</a>
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N. J. A. Sloane, Nov 24 2018
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