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A145758 Number of n X n binary arrays symmetric under horizontal reflection with all ones connected only either three adjacent vertically or three adjacent horizontally. 0

%I #3 Mar 31 2012 12:35:08

%S 1,1,7,3,46,11,1486,401,133777,19881,31874678,3357350,19385116046,

%T 1369262857,34450358764096,1726253429208,166321294438234974,

%U 5602768757076743,2202194423758663223078,51308572928072165575

%N Number of n X n binary arrays symmetric under horizontal reflection with all ones connected only either three adjacent vertically or three adjacent horizontally.

%K nonn

%O 1,3

%A _R. H. Hardin_, Oct 17 2008

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Last modified July 22 07:42 EDT 2024. Contains 374481 sequences. (Running on oeis4.)