%I #9 Nov 23 2015 01:43:01

%S 1,1,4,22,140,992,7584,61420,520320,4570292,41354416,383609434,

%T 3634231140,35059333218,343580813492,3413862553800,34336784362232,

%U 349131316634164,3584622273967324,37128374058146138,387630493693010928

%N Total number of "humps" in all A005316(2n) open meanders with 2n crossings.

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

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

%Y Cf. A005316 (open meanders).

%K nonn

%O 0,3

%A _N. J. A. Sloane_ and _Jon Wild_, Nov 29 2002

%E a(9)-a(20) from _Andrew Howroyd_, Nov 22 2015