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A069397 Half the number of 4 X n binary arrays with a path of adjacent 1's and a path of adjacent 0's from top row to bottom row. 0

%I #9 Apr 07 2021 19:01:27

%S 1,67,2427,66579,1565371,33438451,669776139,12817737731,237180629275,

%T 4277806868563,75628309151275,1315968756706339,22606389934281147,

%U 384286142618740851,6475978445076745163

%N Half the number of 4 X n binary arrays with a path of adjacent 1's and a path of adjacent 0's from top row to bottom row.

%Y Cf. 1 X n A000225, 2 X n A016269, 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 2,2

%A _R. H. Hardin_, Mar 22 2002

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Last modified May 1 14:54 EDT 2024. Contains 372174 sequences. (Running on oeis4.)