id:A071344 - OEIS Search Results

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a(n) = greatest positive r <= n, such that the origin-centered sphere of radius sqrt(r) touches A071342(n) lattice points.

+0
4

1, 2, 9, 14, 21, 29, 41, 62, 74, 89, 101, 134, 161, 194, 209, 230, 269, 314, 341, 374, 425, 446, 521, 569, 614, 629, 689, 761, 794, 866, 941, 941, 941, 1154, 1154, 1286, 1361, 1361, 1454, 1454, 1634, 1634, 1781, 1889, 1889, 2054, 2141, 2246, 2246 (list; graph; listen)

	OFFSET	`1,2`
	EXAMPLE	`a(4)=21 because the largest sphere with radius <= 4 to touch A071342(4)=48 points has radius sqrt(21).`
	PROGRAM	`(FORTRAN) See A071339.`
	CROSSREFS	`Cf. A071339-A071347.` `Sequence in context: A071343 A043401 A045920 this_sequence A106360 A024470 A024472` `Adjacent sequences: A071341 A071342 A071343 this_sequence A071345 A071346 A071347`
	KEYWORD	`easy,nonn`
	AUTHOR	`Hugo Pfoertner (hugo(AT)pfoertner.org), May 22 2002`
	EXTENSIONS	`Edited by Don Reble (djr(AT)nk.ca), Nov 06 2005`

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Last modified December 8 08:31 EST 2009. Contains 170430 sequences.

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