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 A235818 T(n,k)=Number of (n+1)X(k+1) 0..3 arrays with the difference of the upper and lower median value of each 2X2 subblock in lexicographically nondecreasing order columnwise and nonincreasing rowwise 6
 256, 2894, 2894, 28978, 87888, 28978, 268448, 2287822, 2273170, 268448, 2377726, 52447112, 153490516, 52510194, 2377726, 20374112, 1113883030, 8998042696, 9225012664, 1128547722, 20374112, 170668898, 22196597522, 482216047328 (list; table; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 COMMENTS Table starts ........256.........2894..........28978..........268448.........2377726 .......2894........87888........2287822........52447112......1113883030 ......28978......2273170......153490516......8998042696....482216047328 .....268448.....52510194.....9225012664...1441675265430.209596416266780 ....2377726...1128547722...513135357020.220346049497754 ...20374112..22902973310.26782783497172 ..170668898.445722551604 .1404828230 LINKS R. H. Hardin, Table of n, a(n) for n = 1..40 EXAMPLE Some solutions for n=2 k=4 ..0..0..1..0..1....2..0..0..1..1....2..0..0..1..0....2..0..0..1..0 ..0..2..3..0..1....0..1..1..0..0....2..2..1..0..1....0..1..2..0..1 ..2..2..1..2..3....1..1..0..0..0....3..1..1..2..2....3..1..0..1..0 CROSSREFS Column 1 and row 1 are A235574 Sequence in context: A236134 A236588 A236585 * A235577 A235574 A235824 Adjacent sequences: A235815 A235816 A235817 * A235819 A235820 A235821 KEYWORD nonn,tabl AUTHOR R. H. Hardin, Jan 16 2014 STATUS approved

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Last modified December 3 05:03 EST 2023. Contains 367531 sequences. (Running on oeis4.)