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

1,2

Links

Table of n, a(n) for n=1..48.

Example

a(5)=14 because the smallest sphere to touch A071342(5)=48 points has radius sqrt(14).

Prog

(FORTRAN) See A071339.

Crossrefs

Cf. A071339, A071340, A071341, A071342, A071343, A071344, A071345, A071346, A071347. A071609.

Sequence in context: A163735 A144472 A220249 * A043401 A226953 A274133

Adjacent sequences: A071340 A071341 A071342 * A071344 A071345 A071346

Keyword

easy,nonn

Author

Hugo Pfoertner, May 22 2002

Extensions

Edited by Don Reble, Nov 06 2005

Status

approved