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A232320 Number of (4+1)X(n+1) 0..1 arrays with every element equal to some horizontal or antidiagonal neighbor, with top left element zero.

%I A232320 #10 Jul 23 2025 07:18:40
%S A232320 34,551,10409,231454,5142441,113293694,2499669158,55147236337,
%T A232320 1216656297612,26841719357568,592179351445235,13064599837184618,
%U A232320 288229857559634498,6358897503996161509,140289343114550595132
%N A232320 Number of (4+1)X(n+1) 0..1 arrays with every element equal to some horizontal or antidiagonal neighbor, with top left element zero.
%C A232320 Row 4 of A232316
%H A232320 R. H. Hardin, <a href="/A232320/b232320.txt">Table of n, a(n) for n = 1..210</a>
%F A232320 Empirical recurrence of order 78 (see link above)
%e A232320 Some.solutions.for.n=3
%e A232320 ..0..0..0..0....0..0..1..0....0..0..0..0....0..0..1..1....0..0..0..1
%e A232320 ..0..1..0..0....0..1..0..0....1..1..1..1....0..0..1..1....0..0..1..0
%e A232320 ..1..0..0..0....1..0..0..1....1..1..1..0....0..1..1..0....0..1..0..0
%e A232320 ..1..1..1..1....0..1..1..0....0..0..0..1....1..0..0..1....1..1..0..1
%e A232320 ..1..1..1..1....1..0..0..0....1..1..1..1....0..0..1..1....1..0..1..1
%K A232320 nonn
%O A232320 1,1
%A A232320 _R. H. Hardin_, Nov 22 2013