Year-end appeal: Please make a donation to the OEIS Foundation to support ongoing development and maintenance of the OEIS. We are now in our 61st year, we have over 378,000 sequences, and we’ve reached 11,000 citations (which often say “discovered thanks to the OEIS”).
%I #6 Aug 19 2022 15:35:41
%S 8,1,10,17,56,255,1038,4771,21866,102060,476499,2227609,10440370,
%T 48996354,230159202,1081764728,5086004704,23916740145,112479869517,
%U 529026120838,2488273643127,11703911410284,55051772837784
%N Number of 4 X n 0..1 arrays with every element equal to 0, 2, 3 or 4 horizontally or antidiagonally adjacent elements, with upper left element zero.
%C Row 4 of A302150.
%H R. H. Hardin, <a href="/A302152/b302152.txt">Table of n, a(n) for n = 1..210</a>
%F Empirical recurrence of order 85 (see link above).
%e Some solutions for n=5
%e ..0..1..1..1..1. .0..1..1..1..0. .0..1..0..1..1. .0..1..1..0..1
%e ..1..1..1..1..0. .1..1..1..1..1. .0..1..1..1..0. .1..1..1..0..0
%e ..0..1..0..1..1. .1..1..0..1..1. .1..1..0..1..0. .1..1..0..0..0
%e ..1..1..1..1..0. .1..1..1..1..0. .0..1..0..1..0. .0..1..0..0..1
%Y Cf. A302150.
%K nonn
%O 1,1
%A _R. H. Hardin_, Apr 02 2018