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A047889
Number of permutations in S_n with longest increasing subsequence of length <= 4.
+0
8
1, 1, 2, 6, 24, 119, 694, 4582, 33324, 261808, 2190688, 19318688, 178108704, 1705985883, 16891621166, 172188608886, 1801013405436, 19274897768196, 210573149141896, 2343553478425816, 26525044132374656, 304856947930144656
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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 16 17:18 EST 2009. Contains 170825 sequences.
AT&T Labs Research
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