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 A205067 Number of (n+1)X4 0..1 arrays with the number of rightwards and downwards edge increases in each 2X2 subblock differing from the number in all its horizontal and vertical neighbors 1
 98, 90, 144, 220, 347, 524, 850, 1268, 2048, 3060, 4942, 7388, 11938, 17836, 28826, 43060, 69621, 103956, 168108, 250972, 405913, 605900, 980086, 1462772, 2366374, 3531444, 5713346, 8525660, 13794016, 20582764, 33303134, 49691188, 80403523 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 COMMENTS Column 3 of A205072 LINKS R. H. Hardin, Table of n, a(n) for n = 1..210 FORMULA Empirical: a(n) = 3*a(n-2) -2*a(n-6) -2*a(n-8) -4*a(n-10) +2*a(n-14) +3*a(n-16) +a(n-18) for n>20 EXAMPLE Some solutions for n=4 ..1..0..0..1....1..1..0..1....0..0..0..1....0..1..1..1....0..0..1..1 ..0..1..0..1....0..1..0..0....0..1..0..1....1..1..0..1....0..0..0..0 ..0..0..0..0....0..1..1..1....0..0..0..0....1..1..1..0....1..0..1..0 ..0..1..0..1....0..0..0..1....0..1..0..1....0..1..1..1....0..0..0..1 ..0..0..0..0....0..1..0..1....0..0..0..0....1..0..1..1....1..0..0..0 CROSSREFS Sequence in context: A033418 A120310 A129887 * A307371 A273460 A095605 Adjacent sequences: A205064 A205065 A205066 * A205068 A205069 A205070 KEYWORD nonn AUTHOR R. H. Hardin Jan 21 2012 STATUS approved

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Last modified June 9 23:59 EDT 2023. Contains 363183 sequences. (Running on oeis4.)