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Search: id:A080690
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| A080690 |
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Number of acyclic orientations of n X n grid graph. |
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+0
1
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| 1, 14, 2398, 5015972, 128091434266, 39931856138212664, 151966368274993474937668, 7059965159455454640307807067492, 4003910412343921295679925280332950062686
(list; graph; listen)
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OFFSET
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1,2
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REFERENCES
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N. Calkin, C. Merino, S. Noble and M. Noy Improved Bounds for the Number of Forests and Acyclic Orientations in the Square Lattice, The Electronic Journal of Combinatorics, Volume 10(1), 2003
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LINKS
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Peter Tittmann, More Result.
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CROSSREFS
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Sequence in context: A060614 A134814 A015515 this_sequence A079918 A013719 A064075
Adjacent sequences: A080687 A080688 A080689 this_sequence A080691 A080692 A080693
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KEYWORD
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hard,nonn
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AUTHOR
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Andre Poenitz [Po"nitz], Peter Tittmann (poenitz(AT)htwm.de), Mar 03 2003
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