%I #6 May 24 2024 13:17:38
%S 184,82057,279618492,7416076339907,1525002446582690839,
%T 2430369828996738172677912
%N Half the number of lower triangles of an (n+1) X (n+1) 0..7 array with no element equal to the average of its horizontal and vertical neighbors.
%C Column 7 of A194615.
%e Some solutions for 3 X 3
%e ..6......0......5......0......2......1......4......7......6......4......0
%e ..4.1....1.4....6.5....2.6....0.1....2.6....0.6....4.2....5.4....3.6....6.4
%e ..1.6.5..7.5.2..4.0.5..1.5.7..0.6.2..4.3.1..0.6.4..0.6.3..3.7.6..1.2.7..1.7.6
%Y Cf. A194615.
%K nonn
%O 1,1
%A _R. H. Hardin_, Aug 30 2011