A195800 - OEIS

%I #4 Mar 31 2012 12:36:24

%S 1,1,4,64,496,24928,17528896,3850960912

%N Number of triangular nXnXn 0..3 arrays with all rows and diagonals having the same length having the same sum, with corners zero

%C Column 3 of A195805

%e Some solutions for n=5

%e ......0..........0..........0..........0..........0..........0..........0

%e .....3.3........1.0........2.0........2.2........1.0........0.1........2.0

%e ....0.3.0......1.1.3......3.0.3......1.0.1......1.1.1......0.2.0......3.0.3

%e ...3.3.3.3....1.2.0.0....0.0.0.2....2.0.0.2....0.1.1.1....1.2.2.0....0.0.0.2

%e ..0.3.0.3.0..0.0.2.1.0..0.2.3.0.0..0.2.1.2.0..0.1.1.0.0..0.0.0.1.0..0.2.3.0.0

%K nonn

%O 1,3

%A _R. H. Hardin_ Sep 23 2011