%I #3 Mar 31 2012 12:35:35
%S 241,5472,37784,174197,598332,1700146,4185118,9267244,18840617,
%T 35800784,64279915,110110272,181122449,287758922,443428845,665278308,
%U 974595065,1397742124
%N Number of slanted nX6 (i=1..n)X(j=i..6+i-1) 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=16
%e ...1.1.2.2.2.2..............................
%e .....1.1.2.2.2.2............................
%e .......1.1.1.1.2.2..........................
%e .........1.1.2.2.2.2........................
%e ...........1.1.1.1.2.2......................
%e .............1.2.1.1.2.2....................
%e ...............2.2.2.2.3.3..................
%e .................2.2.2.2.3.3................
%e ...................3.3.2.3.3.3..............
%e .....................3.3.3.4.4.4............
%e .......................3.3.4.4.4.4..........
%e .........................3.3.3.3.4.4........
%e ...........................3.3.4.4.4.4......
%e .............................3.3.3.3.4.4....
%e ...............................3.3.4.4.4.4..
%e .................................3.3.3.3.4.4
%K nonn
%O 2,1
%A _R. H. Hardin_ Sep 17 2009
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