A195804 - OEIS

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

%S 1,1,8,512,27412,21779968,479534519840

%N Number of triangular nXnXn 0..7 arrays with all rows and diagonals having the same length having the same sum, with corners zero

%C Column 7 of A195805

%e Some solutions for n=5

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

%e .....1.1........4.0........1.1........2.5........3.0........3.0........6.3

%e ....0.1.2......0.1.2......0.1.2......7.1.2......5.1.6......5.1.6......1.1.2

%e ...2.2.0.0....1.2.0.3....2.2.0.0....2.0.5.4....0.3.2.2....0.3.2.2....3.3.2.5

%e ..0.0.1.2.0..0.3.1.1.0..0.0.1.2.0..0.5.3.3.0..0.3.4.1.0..0.3.4.1.0..0.6.0.4.0

%K nonn

%O 1,3

%A _R. H. Hardin_ Sep 23 2011