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A084218
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a(n)=sigma_4(n^2)/sigma_2(n^2).
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0
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1, 13, 73, 205, 601, 949, 2353, 3277, 5905, 7813, 14521, 14965, 28393, 30589, 43873, 52429, 83233, 76765, 129961, 123205, 171769, 188773, 279313, 239221, 375601, 369109, 478297, 482365, 706441, 570349, 922561, 838861, 1060033, 1082029
(list; graph; refs; listen; history; internal format)
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