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Search: id:A060089
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| A060089 |
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Dimensions of graded algebra associated with meanders. |
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+0
8
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| 1, 1, 3, 7, 23, 63, 213, 627, 2149, 6597, 22787, 71883, 249523, 802291, 2794365, 9111917, 31814061, 104862813, 366796437, 1219313185, 4271041447, 14295561451, 50131159253, 168742700865, 592279599483, 2003050663889
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OFFSET
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0,3
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REFERENCES
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B. Bobier and J. Sawada, A fast algorithm to generate open meandric systems and meanders, preprint, 2007.
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LINKS
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B. Bobier and J. Sawada, Table of n, a(n) for n = 0..28 [from preprint above]
R. Bacher, Meander algebras
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CROSSREFS
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Meander sequences in Bacher's paper: A005315, A060066, A060089, A060111, A060148, A060149, A060174, A060198, A060206.
Sequence in context: A112052 A127178 A058757 this_sequence A148689 A148690 A148691
Adjacent sequences: A060086 A060087 A060088 this_sequence A060090 A060091 A060092
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KEYWORD
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nonn
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AUTHOR
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N. J. A. Sloane (njas(AT)research.att.com), Apr 10 2001
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EXTENSIONS
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More terms from Larry Reeves (larryr(AT)acm.org), Apr 26 2001
Further terms from the Bobier-Sawada paper, Jul 28 2007
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