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A008133
floor(n/3)*floor((n+1)/3).
+0
1
0, 0, 0, 1, 1, 2, 4, 4, 6, 9, 9, 12, 16, 16, 20, 25, 25, 30, 36, 36, 42, 49, 49, 56, 64, 64, 72, 81, 81, 90, 100, 100, 110, 121, 121, 132, 144, 144, 156, 169, 169, 182, 196, 196, 210, 225, 225, 240, 256, 256, 272, 289
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Maintained by
N. J. A. Sloane
(
njas@research.att.com
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Last modified December 17 23:40 EST 2009. Contains 171025 sequences.
AT&T Labs Research
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