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A060111 Dimensions of graded algebra associated with meanders. 8
1, 4, 15, 56, 207, 764, 2805, 10288, 37609, 137380, 500655, 1823440, 6629423, 24090332, 87418221, 317085352, 1148825185, 4160744164, 15054719697, 54454345624, 196805925995, 711077858188, 2567375653681, 9267176552040 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,2

LINKS

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

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: A009940 A081163 A082133 * A077824 A291030 A217779

Adjacent sequences:  A060108 A060109 A060110 * A060112 A060113 A060114

KEYWORD

nonn

AUTHOR

N. J. A. Sloane, Apr 10 2001

EXTENSIONS

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

STATUS

approved

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Last modified February 19 18:30 EST 2019. Contains 320327 sequences. (Running on oeis4.)