A077056 - OEIS

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A077056

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

1, 1, 4, 22, 140, 992, 7584, 61420, 520320, 4570292, 41354416, 383609434, 3634231140, 35059333218, 343580813492, 3413862553800, 34336784362232, 349131316634164, 3584622273967324, 37128374058146138, 387630493693010928 (list; graph; refs; listen; history; text; internal format)

	OFFSET	`0,3`
	COMMENTS	`A "hump" is a local maxima of the upper envelope of the part of the meander that extends above the East-West road.`
	LINKS	`Table of n, a(n) for n=0..20.`
	EXAMPLE	`The three open meanders with 4 crossings have respectively 2, 1 and 1 humps, so a(2) = 4.`
	CROSSREFS	`Cf. A005316 (open meanders).` `Sequence in context: A002293 A181784 A003287 * A227404 A190271 A045744` `Adjacent sequences: A077053 A077054 A077055 * A077057 A077058 A077059`
	KEYWORD	`nonn`
	AUTHOR	`N. J. A. Sloane and Jon Wild, Nov 29 2002`
	EXTENSIONS	`a(9)-a(20) from Andrew Howroyd, Nov 22 2015`
	STATUS	`approved`

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Last modified November 11 23:22 EST 2017. Contains 294529 sequences.