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A060089
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Dimensions of graded algebra associated with meanders.
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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
(list; graph; refs; listen; history; internal format)
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OFFSET
| 0,3
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REFERENCES
| B. Bobier and J. Sawada, A fast algorithm to generate open meandric systems and meanders, ACM Transactions on Algorithms, Vol. 6, No. 2, 2010, article #42.
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LINKS
| 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
| Meander sequences in Bacher's paper: A005315, A060066, A060089, A060111, A060148, A060149, A060174, A060198, A060206.
Sequence in context: A127178 A001275 A058757 * A148689 A148690 A148691
Adjacent sequences: A060086 A060087 A060088 * A060090 A060091 A060092
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KEYWORD
| nonn
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AUTHOR
| N. J. A. Sloane (njas(AT)research.att.com), Apr 10 2001
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EXTENSIONS
| 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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