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A011921
[ n(n-1)(n-2)(n-3)/11 ].
+0
1
0, 0, 0, 0, 2, 10, 32, 76, 152, 274, 458, 720, 1080, 1560, 2184, 2978, 3970, 5192, 6676, 8456, 10570, 13058, 15960, 19320, 23184, 27600, 32618, 38290, 44672, 51820, 59792, 68650, 78458, 89280, 101184
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Maintained by
N. J. A. Sloane
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njas@research.att.com
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Last modified December 21 10:15 EST 2009. Contains 171081 sequences.
AT&T Labs Research
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