id:A127403 - 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 a grid point.

+0
5

1, 4, 4, 13, 13, 25, 31, 40, 46, 61, 73, 85, 103, 124, 130, 163, 169, 199, 211, 244, 262, 295 (list; graph; listen)

	OFFSET	`1,2`
	EXAMPLE	`a(2)=4 because a disk of diameter 2 covers the center of the circle and the 3 net points at distance 1.`
	CROSSREFS	`Cf. A127402, A127404, A127405, A127406. The corresponding sequences for the square lattice and hexagonal lattice are A053411 and A053416, respectively.` `Sequence in context: A106232 A038804 A088838 this_sequence A052993 A005301 A099924` `Adjacent sequences: A127400 A127401 A127402 this_sequence A127404 A127405 A127406`
	KEYWORD	`more,nonn`
	AUTHOR	`Hugo Pfoertner (hugo(AT)pfoertner.org), Feb 08 2007`

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Last modified July 26 13:41 EDT 2008. Contains 142293 sequences.