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Number of n X n binary arrays symmetric under horizontal and vertical reflection with all ones connected only either three adjacent vertically or three adjacent horizontally.
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%I #3 Mar 31 2012 12:35:08

%S 1,1,5,1,10,1,76,9,925,45,17770,476,511138,6933,26358558,199238,

%T 2219828172,8764691,309763488262,657200985,71319461606595,80295518797,

%U 27347236640456545,16444907566268,17338896606364957095,5549422397331424

%N Number of n X n binary arrays symmetric under horizontal and vertical 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