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A060089 Dimensions of graded algebra associated with meanders. 9
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; text; internal format)
OFFSET

0,3

LINKS

B. Bobier and J. Sawada, Table of n, a(n) for n = 0..28 [from preprint below]

R. Bacher, Meander algebras, Institut Fourier, UMR 5582, Laboratoire de Mathématiques, 1999.

B. Bobier and J. Sawada, A fast algorithm to generate open meandric systems and meanders, Transactions on Algorithms, Vol. 6 No. 2 (2010) article #42, 12 pages.

CROSSREFS

Meander sequences in Bacher's paper: A005315, A060066, A060089, A060111, A060148, A060149, A060174, A060198, A060206.

Sequence in context: A001275 A058757 A278455 * A148689 A148690 A148691

Adjacent sequences:  A060086 A060087 A060088 * A060090 A060091 A060092

KEYWORD

nonn

AUTHOR

N. J. A. Sloane, Apr 10 2001

EXTENSIONS

More terms from Larry Reeves (larryr(AT)acm.org), Apr 26 2001

Further terms from the Bobier-Sawada paper, Jul 28 2007

STATUS

approved

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Last modified July 22 05:47 EDT 2019. Contains 325213 sequences. (Running on oeis4.)