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A007590 Floor(n^2/2).
(Formerly M1090)
+0
21
0, 0, 2, 4, 8, 12, 18, 24, 32, 40, 50, 60, 72, 84, 98, 112, 128, 144, 162, 180, 200, 220, 242, 264, 288, 312, 338, 364, 392, 420, 450, 480, 512, 544, 578, 612, 648, 684, 722, 760, 800, 840, 882, 924, 968, 1012, 1058, 1104, 1152, 1200, 1250, 1300, 1352, 1404 (list; graph; listen)
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Last modified December 13 23:45 EST 2009. Contains 170824 sequences.


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