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 A186816 Half the number of (n+2)X(n+2) binary arrays with each 3X3 subblock having sum 4 or 5 0
 126, 3988, 222632, 24581099, 5634207241, 2438542117645, 2065963672906699 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 COMMENTS Diagonal of A186825 LINKS Table of n, a(n) for n=1..7. EXAMPLE Some solutions for 4X4 with a(1,1)=0 ..0..1..0..1....0..1..1..0....0..0..0..0....0..1..0..1....0..0..0..0 ..1..0..1..1....0..0..1..0....0..1..1..1....1..0..1..1....1..1..0..0 ..1..1..0..0....1..1..0..0....0..1..1..0....1..0..0..0....0..1..1..1 ..0..0..1..0....1..0..1..1....0..0..0..0....1..1..0..1....0..0..0..1 CROSSREFS Sequence in context: A285857 A036403 A286976 * A292882 A140902 A270512 Adjacent sequences: A186813 A186814 A186815 * A186817 A186818 A186819 KEYWORD nonn AUTHOR R. H. Hardin Feb 27 2011 STATUS approved

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Last modified July 19 13:29 EDT 2024. Contains 374394 sequences. (Running on oeis4.)