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A224291
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Number of permutations of length n containing exactly 4 occurrences of 123 and 4 occurrences of 132.
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0
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0, 0, 0, 0, 1, 11, 60, 270, 1084, 4028, 14144, 47577, 154740, 489728, 1514786, 4593118, 13682374, 40106060, 115824376, 329901232, 927585696, 2576685888, 7076644480, 19228648192, 51725149184
(list;
graph;
refs;
listen;
history;
text;
internal format)
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OFFSET
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1,6
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LINKS
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MAPLE
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# Programs can be obtained from author's personal website.
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CROSSREFS
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KEYWORD
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nonn
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AUTHOR
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STATUS
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approved
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