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 A183963 Number of (n+1)X2 0..2 arrays with no 2X2 subblock sum differing from a horizontal or vertical neighbor subblock sum by more than one 1
 81, 459, 2601, 15759, 95481, 586791, 3606201, 22235391, 137100681, 845893287, 5219051049, 32205712671, 198734965209, 1226388884391, 7568017506009, 46702383172479, 288201314579049, 1778498201192679, 10975161082334409 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 COMMENTS Column 1 of A183971 LINKS R. H. Hardin, Table of n, a(n) for n = 1..200 FORMULA Empirical: a(n)=6*a(n-1)+6*a(n-3)+81*a(n-4)-468*a(n-5)-72*a(n-6)-432*a(n-8)+1728*a(n-9) EXAMPLE Some solutions for 3X2 ..2..1....1..1....0..2....0..2....1..2....1..0....2..0....0..1....2..1....0..0 ..2..1....0..0....2..2....1..1....2..0....0..1....1..0....1..0....1..2....0..0 ..2..1....0..1....1..2....0..2....0..2....0..1....1..0....1..1....2..2....0..1 ... ...6.......2.......6.......4.......5.......2.......3.......2.......6.......0... ...6.......1.......7.......4.......4.......2.......2.......3.......7.......1... CROSSREFS Sequence in context: A206223 A205208 A183971 * A205293 A205286 A205246 Adjacent sequences:  A183960 A183961 A183962 * A183964 A183965 A183966 KEYWORD nonn AUTHOR R. H. Hardin Jan 08 2011 STATUS approved

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