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Search: id:A053617
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| A053617 |
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Number of {(1234),(1324)}-avoiding permutations. |
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+0
2
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| 1, 2, 6, 22, 90, 396, 1837, 8864, 44074, 224352, 1163724, 6129840, 32703074, 959658200, 5262988330, 29057961666, 161374413196, 900792925199, 5050924332096, 28434661250454, 160644331001476, 910455895039056
(list; graph; listen)
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OFFSET
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1,2
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REFERENCES
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Generated by the Maple package, WILF, written by Doron Zeilberger.
Doron Zeilberger, Enumeration schemes and more importantly their automatic generation, Annals of Combinatorics 2 (1998) 185-195.
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LINKS
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Doron Zeilberger, Home Page
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CROSSREFS
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Cf. A032351.
Sequence in context: A155069 A103137 A165546 this_sequence A089449 A150271 A150272
Adjacent sequences: A053614 A053615 A053616 this_sequence A053618 A053619 A053620
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KEYWORD
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nonn
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AUTHOR
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Moa Apagodu (mohammed(AT)math.temple.edu), Mar 20 2000
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