A071345 - OEIS

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A071345

a(n) is the maximum number of lattice points touched by an origin-centered 4d-sphere with radius <= n.

4

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

(list; graph; refs; listen; history; text; internal format)

OFFSET

1,1

LINKS

Hugo Pfoertner, Table of n, a(n) for n = 1..10001

FORMULA

a(n) = max(i=0 to n^2) A000118(i)

EXAMPLE

a(4)=192 because the 4d-sphere with radius sqrt(14) touches 192 lattice points.

PROG

(Fortran) C See A071339.

CROSSREFS

Cf. A000118, A071339-A071347.

Sequence in context: A241204 A195590 A373867 * A178797 A357285 A100312

Adjacent sequences: A071342 A071343 A071344 * A071346 A071347 A071348

KEYWORD

easy,nonn

AUTHOR

Hugo Pfoertner, May 22 2002

EXTENSIONS

Edited by Don Reble, Nov 06 2005

STATUS

approved