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 A237494 T(n,k)=Number of (n+1)X(k+1) 0..3 arrays with the maximum plus the upper median minus the lower median minus the minimum of every 2X2 subblock differing from its horizontal and vertical neighbors by exactly one 6
 256, 1728, 1728, 11960, 19288, 11960, 84000, 221512, 221512, 84000, 589944, 2584128, 4248736, 2584128, 589944, 4135648, 30171224, 82919944, 82919944, 30171224, 4135648, 28986208, 351706460, 1621147104, 2719193212, 1621147104 (list; table; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 COMMENTS Table starts ........256.........1728..........11960..........84000..........589944 .......1728........19288.........221512........2584128........30171224 ......11960.......221512........4248736.......82919944......1621147104 ......84000......2584128.......82919944.....2719193212.....89364382296 .....589944.....30171224.....1621147104....89364382296...4939887793804 ....4135648....351706460....31641923080..2932161164292.272584971093496 ...28986208...4095080272...616331002428.95933647220152 ..203229696..47706224548.12011356925024 .1425235712.556422733920 .9994034688 LINKS R. H. Hardin, Table of n, a(n) for n = 1..60 FORMULA Empirical for column k: k=1: [linear recurrence of order 24] for n>27 k=2: [order 80] for n>82 EXAMPLE Some solutions for n=2 k=4 ..0..1..0..2..0....0..1..2..1..2....0..0..2..1..0....0..2..0..0..0 ..1..0..2..2..1....1..1..2..0..1....0..3..3..1..0....3..1..0..2..1 ..3..1..1..0..1....2..2..0..2..2....2..1..0..0..2....0..3..2..1..0 CROSSREFS Sequence in context: A237169 A237936 A237931 * A237489 A238054 A238049 Adjacent sequences:  A237491 A237492 A237493 * A237495 A237496 A237497 KEYWORD nonn,tabl AUTHOR R. H. Hardin, Feb 08 2014 STATUS approved

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Last modified June 28 12:00 EDT 2022. Contains 354907 sequences. (Running on oeis4.)