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A033505
G.f.: 1/(1-3*x-x^2+x^3).
+0
3
1, 3, 10, 32, 103, 331, 1064, 3420, 10993, 35335, 113578, 365076, 1173471, 3771911, 12124128, 38970824, 125264689, 402640763, 1294216154, 4160024536, 13371648999, 42980755379, 138153890600, 444070778180, 1427385469761
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Maintained by
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Last modified December 16 17:18 EST 2009. Contains 170825 sequences.
AT&T Labs Research
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