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 A184201 Number of (n+1)X4 binary arrays with no 2X2 subblock containing fewer than two 1s 1
 108, 1028, 8969, 80812, 721939, 6468501, 57909336, 518574936, 4643443850, 41579555979, 372319892218, 3333908362279, 29853191601007, 267317859115808, 2393674819332654, 21433956109836050, 191928522580951331 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 COMMENTS Column 3 of A184207 LINKS R. H. Hardin, Table of n, a(n) for n = 1..200 FORMULA Empirical: a(n)=9*a(n-1)+8*a(n-2)-79*a(n-3)+19*a(n-4)+134*a(n-5)-54*a(n-6)-56*a(n-7)+23*a(n-8)+5*a(n-9)-2*a(n-10) EXAMPLE Some solutions for 3X4 ..1..1..1..1....0..0..1..1....0..1..0..1....1..0..0..1....0..1..0..1 ..0..1..1..0....1..1..1..1....1..1..1..1....0..1..1..1....1..1..1..0 ..1..1..1..1....1..0..0..1....0..0..0..0....1..1..1..1....0..0..1..1 CROSSREFS Sequence in context: A203373 A292343 A228174 * A101213 A202608 A202092 Adjacent sequences: A184198 A184199 A184200 * A184202 A184203 A184204 KEYWORD nonn AUTHOR R. H. Hardin Jan 10 2011 STATUS approved

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Last modified September 15 22:11 EDT 2024. Contains 375959 sequences. (Running on oeis4.)