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A069449 Half the number of 4 X n binary arrays with no path of adjacent 1's or adjacent 0's from top to bottom or side to side. 0

%I #9 Apr 07 2021 18:41:16

%S 7,269,5799,95783,1389619,18772467,243194821,3070812013

%N Half the number of 4 X n binary arrays with no path of adjacent 1's or adjacent 0's from top to bottom or side to side.

%Y Cf. 2 X n 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 2,1

%A _R. H. Hardin_, Mar 22 2002

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Last modified March 28 12:59 EDT 2024. Contains 371254 sequences. (Running on oeis4.)