A145789 - OEIS

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A145789

Number of n X n binary arrays with all ones connected only either four adjacent vertically or four adjacent horizontally.

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

%S 1,1,1,15,89,904,10469,202299,6253788,295345323,20297903190,

%T 2062672356086,313264131593508

%N Number of n X n binary arrays with all ones connected only either four adjacent vertically or four adjacent horizontally.

%K nonn

%O 1,4

%A _R. H. Hardin_, Oct 19 2008