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A133414
Half the number of ways of placing up to n^3 identical weights in an n X n X n grid so that it balances at its center, at most one weight to a grid position.
2
1, 9, 403840, 3134895604437030, 2672411782638277673724960927991328
OFFSET
1,2
CROSSREFS
Sequence in context: A120352 A225069 A058468 * A013850 A174001 A273234
KEYWORD
nonn,more
AUTHOR
R. H. Hardin, Nov 25 2007
STATUS
approved