id:A057712 - OEIS Search Results

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Number of "polyhes" of order n: a polyhe of order n is obtained by taking a polyhex made of n hexagons (A000228); cutting each of the n hexagons along a diameter and throwing away half that hexagon, in such a way that the remaining figure (made of n half-hexagons) is connected.

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1, 4, 13, 60, 276, 1416, 7201, 37972 (list; graph; listen)

	OFFSET	`1,2`
	REFERENCES	`Enumeration attributed by Andrew Clarke to Brendan Owen.`
	LINKS	`Andrew Clarke's Polyhes page` `Picture from Andrew Clarke's page showing triangle formed by combining polyhes of orders 1, 2 and 3.` `Eric Weisstein's World of Mathematics, Polyhe`
	CROSSREFS	`Sequence in context: A149486 A115455 A149487 this_sequence A135312 A005035 A052415` `Adjacent sequences: A057709 A057710 A057711 this_sequence A057713 A057714 A057715`
	KEYWORD	`nonn,nice`
	AUTHOR	`njas, Oct 27 2000`

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Last modified November 21 14:49 EST 2008. Contains 150807 sequences.

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