%I
%S 11,0,7748,70658,1700146,30346872,564638514
%N Number of slanted 7Xn (i=1..7)X(j=i..n+i1) 1..4 arrays with all 1s connected, all 2s connected, all 3s connected, all 4s connected, 1 in the upper left corner, 2 in the upper right corner, 3 in the lower left corner, 4 in the lower right corner, and with no element having more than 3 neighbors with the same value
%e One solution for n=8
%e ...1.1.2.2.2.2.2.2............
%e .....1.1.2.2.2.3.2.2..........
%e .......1.2.3.2.3.2.2.2........
%e .........3.3.2.3.2.3.3.4......
%e ...........3.3.3.2.3.4.4.4....
%e .............3.3.2.3.3.3.4.4..
%e ...............3.3.3.3.3.3.4.4
%K nonn
%O 2,1
%A _R. H. Hardin_ Sep 17 2009
