A069437 - OEIS

%I #9 Apr 07 2021 18:44:19

%S 1023,2077552,4174954460,8318320069722

%N Half the number of 11 X n binary arrays with no path of adjacent 1's or adjacent 0's from top row to bottom row.

%Y Cf. 2 X n A000079, n X 1 A000225, vertical path of 1 A069361-A069395, vertical paths of 0+1 A069396-A069416, vertical path of 1 not 0 A069417-A069428, no vertical paths A069429-A069447, no horizontal or vertical paths A069448-A069452.

%K nonn

%O 1,1

%A _R. H. Hardin_, Mar 22 2002