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A071341
a(n) = greatest positive r <= n, such that the origin-centered circle of radius sqrt(r) touches A071339(n) lattice points.
1
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
OFFSET
0,3
EXAMPLE
a(4)=13 because the largest circle with radius <= 4 to touch A071339(4)=8 points has radius sqrt(13).
PROG
(FORTRAN) See A071339.
CROSSREFS
KEYWORD
easy,nonn
AUTHOR
Hugo Pfoertner, May 22 2002
EXTENSIONS
Edited by Don Reble, Nov 06 2005
STATUS
approved