A071343 a(n) = least positive r <= n, such that the origin-centered sphere of radius sqrt(r) touches A071342(n) lattice points.
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
Examples
a(5)=14 because the smallest sphere to touch A071342(5)=48 points has radius sqrt(14).
Crossrefs
Programs
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FORTRAN
See A071339.
Extensions
Edited by Don Reble, Nov 06 2005