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A071345
a(n) = the maximum number of lattice points touched by an origin-centered 4d-sphere with radius <= n.
3
8, 32, 104, 192, 312, 576, 768, 960, 1344, 1872, 1920, 2496, 2976, 3072, 4608, 4608, 5760, 5760, 6912, 8064, 8064, 9672, 10368, 11520, 11520, 14976, 14976, 14976, 17424, 17784, 18432, 22464, 23808, 23808, 26208, 26208, 29760, 29952, 32832
OFFSET
1,1
FORMULA
a(n) = max(1=0 to n^2) A000118(i)
EXAMPLE
a(4)=192 because the 4d-sphere with radius sqrt(14) touches 192 lattice points.
PROG
(FORTRAN) See A071339.
CROSSREFS
KEYWORD
easy,nonn
AUTHOR
Hugo Pfoertner, May 22 2002
EXTENSIONS
Edited by Don Reble, Nov 06 2005
STATUS
approved