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A002871 Sorting numbers (see Motzkin article for details).
(Formerly M1261 N0483)
+0
2
1, 2, 4, 12, 48, 200, 1040, 5600, 33600 (list; graph; listen)
OFFSET

0,2

REFERENCES

T. S. Motzkin, Sorting numbers ...: for a link to this paper see A000262.

T. S. Motzkin, Sorting numbers for cylinders and other classification numbers, in Combinatorics, Proc. Symp. Pure Math. 19, AMS, 1971, pp. 167-176.

LINKS

Index entries for sequences related to sorting

CROSSREFS

Adjacent sequences: A002868 A002869 A002870 this_sequence A002872 A002873 A002874

Sequence in context: A074449 A131387 A004527 this_sequence A013172 A052849 A098558

KEYWORD

nonn,nice,more

AUTHOR

njas

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Last modified October 7 14:39 EDT 2008. Contains 144666 sequences.


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