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A006004
C(n+2,3)+C(n,3)+C(n-1,3).
(Formerly M3412)
+0
1
1, 4, 11, 25, 49, 86, 139, 211, 305, 424, 571, 749, 961, 1210, 1499, 1831, 2209, 2636, 3115, 3649, 4241, 4894, 5611, 6395, 7249, 8176, 9179, 10261, 11425, 12674, 14011, 15439, 16961, 18580, 20299, 22121
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Maintained by
N. J. A. Sloane
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Last modified November 25 20:09 EST 2009. Contains 167514 sequences.
AT&T Labs Research
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