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%I #6 Jun 16 2023 15:32:32
%S 1,29,416,4776,50720,522982,5323854,53861817,543240561,5470511797,
%T 55045873418,553670627178,5567917242290,55987505409573,
%U 562947468953116,5660225918946978,56910735678528024,572205314886589089
%N Number of n X 4 binary arrays with all 1's connected and a path of 1's from left column to lower right corner.
%H R. H. Hardin, <a href="/A163021/b163021.txt">Table of n, a(n) for n=1..44</a>
%K nonn
%O 1,2
%A _R. H. Hardin_, Jul 20 2009