id:A053596 - OEIS Search Results

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Open 3-dimensional ball numbers (version 4): a(n)= number of integer points (i,j,k) contained in a open ball of diameter n, centered at (1/2,1/2,1/2).

+0
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0, 0, 8, 8, 32, 56, 136, 160, 280, 360, 552, 672, 912, 1088, 1472, 1736, 2176, 2512, 3112, 3544, 4224, 4776, 5616, 6272, 7208, 8144, 9328, 10144, 11536, 12712, 14328, 15408, 17256, 18656, 20672, 22400, 24464, 26344, 28768, 30976, 33552 (list; graph; listen)

	OFFSET	`0,3`
	COMMENT	`a(n)/(n/2)^3->4/3*Pi`
	CROSSREFS	`Sequence in context: A133038 A143336 A122858 this_sequence A141384 A111218 A103744` `Adjacent sequences: A053593 A053594 A053595 this_sequence A053597 A053598 A053599`
	KEYWORD	`easy,nonn`
	AUTHOR	`Klaus Strassburger (strass(AT)ddfi.uni-duesseldorf.de), Jan 19 2000`

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Last modified December 2 11:54 EST 2009. Contains 167921 sequences.

AT&T Labs Research