id:A053593 - OEIS Search Results

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

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0, 2, 2, 20, 28, 70, 110, 192, 256, 402, 498, 708, 884, 1166, 1422, 1800, 2104, 2594, 3026, 3588, 4140, 4918, 5542, 6432, 7224, 8186, 9122, 10380, 11460, 12790, 14094, 15624, 17080, 18882, 20458, 22500, 24364, 26590, 28678, 31136, 33400 (list; graph; listen)

	OFFSET	`0,2`
	COMMENT	`a(n)/(n/2)^3->4/3*Pi`
	CROSSREFS	`Adjacent sequences: A053590 A053591 A053592 this_sequence A053594 A053595 A053596` `Sequence in context: A093777 A103129 A009340 this_sequence A002907 A134046 A081687`
	KEYWORD	`easy,nonn`
	AUTHOR	`Klaus Strassburger (strass(AT)ddfi.uni-duesseldorf.de), Jan 19 2000`

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Last modified October 11 13:47 EDT 2008. Contains 144830 sequences.

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