%I #3 Mar 31 2012 12:35:35

%S 1,6460,14252749,10459516337,2908246084285,398461742491565

%N Number of 15X15X15 triangular nonnegative integer arrays, symmetric under 120 degree rotation, with all sums of an element and its neighbors <= n

%K nonn

%O 0,2

%A _R. H. Hardin_ Oct 09 2009