id:A053594 - OEIS Search Results

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Open 3-dimensional ball numbers (version 2): a(n)= number of integer points (i,j,k) contained in a open ball of diameter n, centered at (1/2,0,0).

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0, 0, 2, 10, 28, 60, 110, 174, 256, 368, 498, 682, 884, 1140, 1422, 1750, 2104, 2560, 3026, 3546, 4140, 4828, 5542, 6382, 7224, 8136, 9122, 10274, 11460, 12732, 14094, 15558, 17080, 18752, 20458, 22410, 24364, 26516, 28678, 31006, 33400 (list; graph; listen)

	OFFSET	`0,3`
	COMMENT	`a(n)/(n/2)^3->4/3*Pi`
	CROSSREFS	`Sequence in context: A057753 A060515 A109723 this_sequence A006331 A104657 A000900` `Adjacent sequences: A053591 A053592 A053593 this_sequence A053595 A053596 A053597`
	KEYWORD	`easy,nonn`
	AUTHOR	`Klaus Strassburger (strass(AT)ddfi.uni-duesseldorf.de), Jan 19 2000`

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Last modified November 25 13:47 EST 2009. Contains 167481 sequences.

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