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%I #8 Jan 13 2023 16:26:32
%S 1,20,234,2423,24455,245972,2473317,24868730,250043151,2514035445,
%T 25277060955,254144975454,2555267942068,25691612225457,
%U 258313003017344,2597174783771339,26112958991681036,262549379235881855
%N Number of n X 4 binary arrays with all 1s connected and a path of 1s from upper left corner to lower right corner.
%H R. H. Hardin, <a href="/A163004/b163004.txt">Table of n, a(n) for n=1..44</a>
%Y Row 4 of A359573.
%K nonn
%O 1,2
%A _R. H. Hardin_, Jul 20 2009