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 A250581 Number of (n+1)X(6+1) 0..1 arrays with nondecreasing max(x(i,j),x(i,j-1)) in the i direction and nondecreasing min(x(i,j),x(i-1,j)) in the j direction 1
 635, 1743, 4077, 9055, 19806, 43202, 94623, 208525, 463050, 1035676, 2332670, 5285207, 12037997, 27534946, 63206421, 145492457, 335661686, 775727155, 1795208098, 4158803848, 9642241072, 22369233408, 51919766166, 120550121826 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 COMMENTS Column 6 of A250583 LINKS R. H. Hardin, Table of n, a(n) for n = 1..210 FORMULA Empirical: a(n) = 7*a(n-1) -14*a(n-2) -11*a(n-3) +80*a(n-4) -93*a(n-5) -38*a(n-6) +174*a(n-7) -134*a(n-8) +54*a(n-10) -29*a(n-11) +5*a(n-12) for n>15 EXAMPLE Some solutions for n=6 ..0..0..0..0..0..1..1....0..0..0..0..0..0..1....0..0..0..0..0..0..0 ..0..1..1..1..1..1..1....0..0..0..0..0..0..1....0..0..0..0..0..0..0 ..1..0..1..1..1..1..1....0..0..0..1..1..1..1....0..0..0..0..0..0..0 ..0..1..1..1..1..1..1....0..0..0..1..1..1..1....0..0..0..0..1..1..1 ..1..1..1..1..1..1..1....0..0..1..0..1..1..1....0..0..0..0..1..1..1 ..1..1..1..1..1..1..1....0..1..0..1..1..1..1....1..0..0..1..0..1..1 ..0..1..1..1..1..1..1....1..0..1..0..1..1..1....0..1..1..0..1..1..1 CROSSREFS Sequence in context: A252124 A112137 A260244 * A061623 A253506 A202048 Adjacent sequences: A250578 A250579 A250580 * A250582 A250583 A250584 KEYWORD nonn AUTHOR R. H. Hardin, Nov 25 2014 STATUS approved

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Last modified September 19 16:34 EDT 2024. Contains 376014 sequences. (Running on oeis4.)