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A053457
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Open disk numbers (version 2): a(n)= number of points (i,j), i,j, integers, contained in a open disk of diameter n, centered at (0,1/2).
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0
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0, 0, 2, 6, 12, 16, 26, 38, 48, 60, 78, 94, 108, 128, 154, 174, 196, 224, 250, 278, 312, 344, 378, 410, 452, 484, 526, 574, 612, 652, 698, 754, 800, 848, 906, 958, 1012, 1068, 1130, 1190, 1252, 1316, 1378, 1446, 1516, 1588, 1654, 1730, 1808, 1880, 1954
(list; graph; refs; listen; history; internal format)
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