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A027658
C(n+2,2)+C(n+4,5).
+0
2
1, 4, 12, 31, 71, 147, 280, 498, 837, 1342, 2068, 3081, 4459, 6293, 8688, 11764, 15657, 20520, 26524, 33859, 42735, 53383, 66056, 81030, 98605, 119106, 142884, 170317, 201811, 237801, 278752
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Maintained by
N. J. A. Sloane
(
njas@research.att.com
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Last modified December 20 16:54 EST 2009. Contains 171081 sequences.
AT&T Labs Research
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