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 A235584 Number of (n+1)X(1+1) 0..2 arrays with the difference of the upper median and minimum value of each 2X2 subblock in lexicographically nondecreasing order rowwise and columnwise 2
 81, 549, 3459, 20537, 118383, 668041, 3720671, 20536617, 112678583, 615713801, 3355123119, 18247718361, 99114889783, 537869173209, 2917048830575, 15813348936265, 85698834939287, 464340717123881, 2515573121736751 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 COMMENTS Column 1 of A235588 LINKS R. H. Hardin, Table of n, a(n) for n = 1..210 FORMULA Empirical: a(n) = 9*a(n-1) -172*a(n-3) +215*a(n-4) +1269*a(n-5) -1994*a(n-6) -4634*a(n-7) +7460*a(n-8) +8872*a(n-9) -13168*a(n-10) -8416*a(n-11) +10560*a(n-12) +3072*a(n-13) -3072*a(n-14) EXAMPLE Some solutions for n=5 ..0..1....0..0....2..0....1..2....2..0....2..0....1..2....0..1....1..2....0..2 ..0..0....1..0....0..1....1..2....0..0....1..1....2..2....1..1....2..1....1..1 ..0..1....2..1....0..1....0..2....0..0....1..0....2..1....1..0....1..0....0..2 ..1..2....2..1....0..1....2..0....0..0....1..1....1..2....0..1....2..1....0..1 ..1..2....1..0....0..2....2..0....1..2....1..0....2..0....2..2....1..2....1..0 ..2..0....0..2....0..1....2..1....0..1....1..0....1..2....0..1....2..2....2..1 CROSSREFS Sequence in context: A235833 A235588 A206505 * A231973 A205894 A186536 Adjacent sequences:  A235581 A235582 A235583 * A235585 A235586 A235587 KEYWORD nonn AUTHOR R. H. Hardin, Jan 12 2014 STATUS approved

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Last modified November 25 09:41 EST 2020. Contains 338623 sequences. (Running on oeis4.)