%I #5 Apr 28 2021 00:16:03
%S 1,2,1,1,2,1,4,13,18,49,140,188,406,1769,3341,8622,44447,84993,281707,
%T 1724133,3711938,16716005,125407513,356014822,1906068709,17144172762,
%U 59257809503,359265884506,3898069443043
%N Number of planar n X n X n binary triangular grids symmetric under 120 degree rotation with no more than 2 ones in any 5 X 5 X 5 subtriangle.
%K nonn
%O 0,2
%A _R. H. Hardin_, Jan 03 2009
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