A060111 Dimensions of graded algebra associated with meanders.

1, 4, 15, 56, 207, 764, 2805, 10288, 37609, 137380, 500655, 1823440, 6629423, 24090332, 87418221, 317085352, 1148825185, 4160744164, 15054719697, 54454345624, 196805925995, 711077858188, 2567375653681, 9267176552040

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