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A006220
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From descending subsequences of permutations.
(Formerly M2866)
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1
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1, 1, 3, 10, 45, 251, 1638, 12300, 104877, 1000135, 10534062, 121436206, 1521332904
(list;
graph;
refs;
listen;
history;
text;
internal format)
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OFFSET
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1,3
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REFERENCES
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N. J. A. Sloane and Simon Plouffe, The Encyclopedia of Integer Sequences, Academic Press, 1995 (includes this sequence).
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LINKS
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CROSSREFS
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KEYWORD
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nonn,more
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AUTHOR
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EXTENSIONS
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STATUS
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approved
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