A165390 - OEIS

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

%S 11,296,24225,993780,33107075,948440084,25614600093,655460808868

%N Number of slanted 7Xn (i=1..7)X(j=i..n+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, and 4 in the lower right corner

%e One solution for n=8

%e ...1.1.2.2.2.2.2.2............

%e .....1.1.2.2.3.3.2.2..........

%e .......1.2.3.3.3.3.2.2........

%e .........3.3.3.3.3.3.3.4......

%e ...........3.3.3.3.3.4.4.4....

%e .............3.3.3.4.4.4.4.4..

%e ...............3.4.4.4.4.4.4.4

%K nonn

%O 2,1

%A _R. H. Hardin_ Sep 17 2009