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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

%I #8 Nov 29 2017 03:35:00

%S 1,9,403840,3134895604437030,2672411782638277673724960927991328

%N 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.

%K nonn,more

%O 1,2

%A _R. H. Hardin_, Nov 25 2007