id:A071341 - OEIS Search Results

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a(n) = greatest positive r <= n, such that the origin-centered circle of radius sqrt(r) touches A071339(n) lattice points.

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0, 1, 4, 5, 13, 25, 25, 25, 50, 65, 85, 85, 130, 145, 185, 221, 250, 265, 305, 325, 325, 425, 425, 425, 425, 425, 650, 725, 725, 725, 850, 925, 925, 1025, 1105, 1105, 1105, 1105, 1105, 1105, 1105, 1625, 1625, 1625, 1885, 1885, 1885, 2125, 2210 (list; graph; listen)

	OFFSET	`0,3`
	EXAMPLE	`a(4)=13 because the largest circle with radius <= 4 to touch A071339(4)=8 points has radius sqrt(13).`
	PROGRAM	`(FORTRAN) See A071339.`
	CROSSREFS	`Cf. A071339-A071347.` `Sequence in context: A005672 A147001 A140683 this_sequence A102981 A029663 A082312` `Adjacent sequences: A071338 A071339 A071340 this_sequence A071342 A071343 A071344`
	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 5 08:23 EST 2009. Contains 170348 sequences.

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