0,3

A "hump" is a local maxima of the upper envelope of the part of the meander that extends above the East-West road.

Table of n, a(n) for n=0..8.

The three open meanders with 4 crossings have respectively 2, 1 and 1 humps, so a(2) = 4.

Cf. A005316 (open meanders).

Sequence in context: A002293 A181784 A003287 * A227404 A190271 A045744

Adjacent sequences:  A077053 A077054 A077055 * A077057 A077058 A077059

nonn,more

N. J. A. Sloane and Jon Wild, Nov 29 2002

approved