A046724 Number of semi-meanders of order n with 5 components.

1, 5, 24, 104, 438, 1796, 7238, 28848, 113518, 444278, 1720384, 6643492, 25421620, 97136712, 368280210, 1395104236, 5250325378, 19746342212, 73863421894, 276113486146, 1027609657470, 3821478801772, 14161346139866, 52428406903688, 193568833452364, 713860635606784

Offset

5,2

Links

Andrew Howroyd, Table of n, a(n) for n = 5..40

P. Di Francesco, O. Golinelli and E. Guitter, Meander, folding and arch statistics, arXiv:hep-th/9506030, 1995.

Crossrefs

Cf. A000682, A046726.

Sequence in context: A291395 A179417 A181305 * A272578 A273622 A271009

Adjacent sequences: A046721 A046722 A046723 * A046725 A046726 A046727

Keyword

nonn

Author

N. J. A. Sloane

Extensions

a(15)-a(40) from Andrew Howroyd, Dec 07 2015

Status

approved