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A119867
Number of different values assumed by a*b+c*d as a,b,c,d range between 1 and n.
+0
2
1, 6, 14, 25, 40, 57, 79, 103, 132, 165, 201, 239, 283, 329, 379, 434, 493, 554, 620, 688, 762, 839, 918, 1000, 1089, 1182, 1277, 1376, 1480, 1586, 1698, 1811, 1930, 2051, 2175, 2306, 2441
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Maintained by
N. J. A. Sloane
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Last modified December 19 12:50 EST 2009. Contains 171053 sequences.
AT&T Labs Research
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