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 A251152 Number of (n+1)X(2+1) 0..2 arrays with no 2X2 subblock having the minimum of its diagonal elements greater than the absolute difference of its antidiagonal elements 1
 470, 8407, 148833, 2644832, 46958048, 833966807, 14810089440, 263012232516, 4670807329618, 82948521103259, 1473076057445537, 26160241273743965, 464577643321668439, 8250397474900690408, 146518153252603690037 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 COMMENTS Column 2 of A251158 LINKS R. H. Hardin, Table of n, a(n) for n = 1..210 FORMULA Empirical: a(n) = 17*a(n-1) +42*a(n-2) -498*a(n-3) -335*a(n-4) +3258*a(n-5) +529*a(n-6) -8805*a(n-7) +550*a(n-8) +7570*a(n-9) +519*a(n-10) -2235*a(n-11) +561*a(n-12) +567*a(n-13) -134*a(n-14) -64*a(n-15) +8*a(n-16) EXAMPLE Some solutions for n=3 ..0..2..1....2..0..1....0..1..0....0..1..1....2..0..1....0..1..2....0..1..2 ..2..2..1....2..1..2....0..0..0....2..0..1....1..0..0....0..0..2....1..0..1 ..0..2..1....2..0..1....0..0..1....2..1..1....0..0..2....0..1..2....2..1..1 ..0..0..1....2..0..1....0..1..2....1..0..1....0..1..2....2..0..2....2..0..0 CROSSREFS Sequence in context: A254423 A254416 A251771 * A345535 A345787 A265137 Adjacent sequences: A251149 A251150 A251151 * A251153 A251154 A251155 KEYWORD nonn AUTHOR R. H. Hardin, Nov 30 2014 STATUS approved

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Last modified April 22 01:34 EDT 2024. Contains 371887 sequences. (Running on oeis4.)