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Search: id:A071340
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A071340 a(n) = least positive r <= n such that the origin-centered circle of radius sqrt(r) touches A071339(n) lattice points. +0
1
0, 1, 1, 5, 5, 25, 25, 25, 25, 65, 65, 65, 65, 65, 65, 65, 65, 65, 65, 325, 325, 325, 325, 325, 325, 325, 325, 325, 325, 325, 325, 325, 325, 325, 1105, 1105, 1105, 1105, 1105, 1105, 1105, 1105, 1105, 1105, 1105, 1105, 1105, 1105, 1105, 1105, 1105, 1105, 1105 (list; graph; listen)
OFFSET

0,4

LINKS

Hugo Pfoertner, Illustration

EXAMPLE

a(4)=5 because the smallest circle to touch A071339(4)=8 points has radius sqrt(5).

PROGRAM

(FORTRAN) See A071339.

CROSSREFS

Cf. A071339-A071347.

Adjacent sequences: A071337 A071338 A071339 this_sequence A071341 A071342 A071343

Sequence in context: A014619 A097016 A090936 this_sequence A056451 A074872 A038247

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 October 7 14:39 EDT 2008. Contains 144666 sequences.


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