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A259707
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Irregular triangle read by rows: T(n,k) = number of permutations of n elements which have k overlaps.
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1
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1, 2, 4, 2, 10, 12, 2, 24, 48, 34, 12, 2, 66, 196, 230, 144, 70, 12, 2
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OFFSET
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2,2
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REFERENCES
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A. Sade, Sur les Chevauchements des Permutations, published by the author, Marseille, 1949.
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LINKS
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EXAMPLE
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Triangle begins:
1,
2,
4,2,
10,12,2,
24,48,34,12,2,
66,196,230,144,70,12,2,
...
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CROSSREFS
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KEYWORD
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nonn,tabf,more
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AUTHOR
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STATUS
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approved
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