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 A237809 T(n,k)=Number of (n+1)X(k+1) 0..2 arrays with the maximum plus the upper median minus the minimum of every 2X2 subblock equal 9
 81, 295, 295, 1085, 1775, 1085, 4251, 10433, 10433, 4251, 16837, 65777, 94325, 65777, 16837, 67947, 413659, 932255, 932255, 413659, 67947, 276369, 2653941, 9105033, 14666689, 9105033, 2653941, 276369, 1134515, 17059551, 91394885, 226466977 (list; table; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 COMMENTS Table starts .......81........295.........1085............4251.............16837 ......295.......1775........10433...........65777............413659 .....1085......10433........94325..........932255...........9105033 .....4251......65777.......932255........14666689.........226466977 ....16837.....413659......9105033.......226466977........5485899329 ....67947....2653941.....91394885......3610379651......138098717927 ...276369...17059551....915038911.....57208751041.....3440879056209 ..1134515..110537541...9256755467....917186234601....86981634666031 ..4684181..717782983..93619867803..14670753459691..2188618346093079 .19450171.4679120817.951123379379.235787348326225.55402156423091417 LINKS R. H. Hardin, Table of n, a(n) for n = 1..161 FORMULA Empirical for column k: k=1: [linear recurrence of order 18] k=2: [order 36] k=3: [order 87] EXAMPLE Some solutions for n=3 k=4 ..0..0..2..0..2....0..0..0..0..2....0..0..1..1..2....0..0..1..2..1 ..2..2..2..2..1....2..1..2..1..0....2..1..2..2..2....1..2..1..0..0 ..0..0..2..0..2....1..2..1..2..1....0..0..1..1..2....0..1..2..1..2 ..2..2..2..2..1....0..1..0..1..0....1..2..0..2..2....2..0..0..1..2 CROSSREFS Sequence in context: A236048 A235954 A235947 * A237802 A237779 A237772 Adjacent sequences:  A237806 A237807 A237808 * A237810 A237811 A237812 KEYWORD nonn,tabl AUTHOR R. H. Hardin, Feb 13 2014 STATUS approved

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Last modified January 24 13:48 EST 2022. Contains 350538 sequences. (Running on oeis4.)