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%I #9 Oct 03 2025 09:50:00
%S 41503,14089479,16878985502,71167367871410,1055277790676846818,
%T 55803648810496645652897,10454480376363017611676717695
%N Number of (n+3)X(n+3) binary arrays with no more than three of any consecutive four bits set in any row or column.
%C Diagonal of A202726
%e Some solutions for n=2
%e ..0..0..0..0..0....0..0..0..1..0....1..1..0..0..1....0..1..1..1..0
%e ..0..1..0..1..1....0..1..1..1..0....1..0..0..0..0....1..0..1..1..1
%e ..1..0..1..1..1....0..1..1..0..0....0..0..1..0..1....1..0..0..1..0
%e ..1..0..0..1..1....0..1..0..0..0....0..1..0..0..0....0..0..1..0..0
%e ..1..1..1..0..0....0..0..1..0..1....0..1..1..0..0....0..1..0..0..0
%K nonn
%O 1,1
%A _R. H. Hardin_, Dec 23 2011