id:A127402 - OEIS Search Results

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Number of points in a honeycomb net covered by a circular disk of diameter n if the center of the circle is chosen at the deep hole.

+0
5

0, 6, 6, 12, 12, 24, 24, 42, 54, 60, 72, 84, 96, 126, 138, 156, 168, 204, 204, 246, 270, 288 (list; graph; listen)

	OFFSET	`1,2`
	EXAMPLE	`a(2)=6 because a disk of diameter 2 covers the 6 net points surrounding the deep hole.`
	CROSSREFS	`Cf. A127403, A127404, A127405, A127406. The corresponding sequences for the square lattice and hexagonal lattice are A053415 and A053479, respectively.` `Sequence in context: A124508 A028317 A055665 this_sequence A161418 A124691 A112437` `Adjacent sequences: A127399 A127400 A127401 this_sequence A127403 A127404 A127405`
	KEYWORD	`more,nonn`
	AUTHOR	`Hugo Pfoertner (hugo(AT)pfoertner.org), Feb 08 2007`

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Last modified December 8 08:31 EST 2009. Contains 170430 sequences.