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A084825
Maximum number of spheres of diameter one that can be packed in a cube of edge length n.
2
OFFSET
1,2
COMMENTS
The next term a(4) is at least 64. From an extrapolation of Dave Boll's numerical results a(4)~=66 and a(5)~=141 are estimated values for the next terms.
EXAMPLE
a(3)=27 because there is no known better arrangement than the 3*3*3 cubic one that would allow packing more than 27 spheres into a cube of edge length 3.
CROSSREFS
KEYWORD
hard,more,nonn
AUTHOR
Hugo Pfoertner, Jun 12 2003
EXTENSIONS
a(4) from Hugo Pfoertner, May 21 2011
Replaced dead link to Dave Boll's web page and added link to visualization web page by Hugo Pfoertner, May 21 2011
STATUS
approved