A154075 - OEIS

%I #3 Mar 31 2012 12:35:22

%S 1650,6592,10881,16801,14513,14220,11083,6900,3475,1606,588,460,253,

%T 244,241,240,300,240,240,240,240,300,240,240,240,240,300,240,240,240,

%U 240,300,240,240,240,240,300,240,240,240,240,300,240,240,240,240,300,240,240

%N Number of planar triangular n X n X n nonnegative integer grids with mirror symmetry about one altitude with every similarly oriented 5 X 5 X 5 subtriangle summing to 9.

%C Pattern 240 300 240 240 240 starts at n=20 and continues through at least n=53.

%K nonn

%O 5,1

%A _R. H. Hardin_ Jan 04 2009