id:A001182 - OEIS Search Results

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Number of cells of square lattice of edge 1/n inside quadrant of unit circle centered at 0.

+0
7

0, 1, 4, 8, 15, 22, 30, 41, 54, 69, 83, 98, 119, 139, 162, 183, 208, 234, 263, 294, 322, 357, 390, 424, 465, 504, 545, 585, 628, 675, 719, 770, 819, 872, 928, 977, 1036, 1090, 1155, 1216, 1274, 1339, 1404, 1475, 1545, 1610, 1683, 1755, 1832, 1911, 1992, 2072 (list; graph; listen)

	OFFSET	`1,3`
	FORMULA	`a(n)=sum{k=1..n-1}floor(sqrt(n^2-k^2)) - Horst Kraemer (horst.kraemer(AT)epost.de) Apr 07 2004`
	CROSSREFS	`Sequence in context: A113902 A024916 A102216 this_sequence A122247 A126255 A014146` `Adjacent sequences: A001179 A001180 A001181 this_sequence A001183 A001184 A001185`
	KEYWORD	`nonn`
	AUTHOR	`Tihamer von Ghyczy (ghyczy(AT)esinet.net)`
	EXTENSIONS	`More terms from Klaus Strassburger (strass(AT)ddfi.uni-duesseldorf.de), More terms from Jan 19 2000`

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Last modified July 25 07:41 EDT 2008. Contains 142293 sequences.

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