A046725 Number of semi-meanders of order n with 6 components.

1, 6, 32, 152, 690, 3028, 12996, 54812, 228284, 939148, 3833076, 15487428, 62244564, 247973928, 984221764, 3876113404, 15223550024, 59379645924, 231124139318, 894157177372, 3453279084296, 13266154255196, 50886266714598, 194294744477756, 740816697816046

Offset: 6

Author

N. J. A. Sloane

Keywords

• nonn

Links

• Andrew Howroyd, Table of n, a(n) for n = 6..40
• P. Di Francesco, O. Golinelli and E. Guitter, Meander, folding and arch statistics, arXiv:hep-th/9506030, 1995.

Crossrefs

Cf. A000682, A046726.

Extensions

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