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A071343
a(n) = least positive r <= n, such that the origin-centered sphere of radius sqrt(r) touches A071342(n) lattice points.
3
1, 2, 9, 14, 14, 26, 41, 41, 74, 89, 101, 101, 146, 194, 194, 194, 269, 314, 341, 341, 341, 446, 446, 446, 614, 626, 689, 689, 794, 854, 941, 941, 941, 1154, 1154, 1286, 1361, 1361, 1361, 1361, 1634, 1634, 1781, 1889, 1889, 1889, 2141, 2141
OFFSET
1,2
EXAMPLE
a(5)=14 because the smallest sphere to touch A071342(5)=48 points has radius sqrt(14).
PROG
(FORTRAN) See A071339.
KEYWORD
easy,nonn
AUTHOR
Hugo Pfoertner, May 22 2002
EXTENSIONS
Edited by Don Reble, Nov 06 2005
STATUS
approved