id:A053457 - OEIS Search Results

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Open disk numbers (version 2): a(n)= number of points (i,j), i,j, integers, contained in a open disk of diameter n, centered at (0,1/2).

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0, 0, 2, 6, 12, 16, 26, 38, 48, 60, 78, 94, 108, 128, 154, 174, 196, 224, 250, 278, 312, 344, 378, 410, 452, 484, 526, 574, 612, 652, 698, 754, 800, 848, 906, 958, 1012, 1068, 1130, 1190, 1252, 1316, 1378, 1446, 1516, 1588, 1654, 1730, 1808, 1880, 1954 (list; graph; listen)

	OFFSET	`0,3`
	COMMENT	`a(n)/(n/2)^2->Pi`
	CROSSREFS	`A053414, A053456-A053459.` `Sequence in context: A088915 A084790 A130237 this_sequence A154030 A055560 A108727` `Adjacent sequences: A053454 A053455 A053456 this_sequence A053458 A053459 A053460`
	KEYWORD	`easy,nonn`
	AUTHOR	`Klaus Strassburger (strass(AT)ddfi.uni-duesseldorf.de), Jan 13 2000`

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Last modified November 27 22:38 EST 2009. Contains 167602 sequences.

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