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 A238072 T(n,k)=Number of (n+1)X(k+1) 0..3 arrays with the maximum minus the minimum of every 2X2 subblock differing from its horizontal and vertical neighbors by exactly one 9
 256, 1644, 1644, 10700, 16116, 10700, 67056, 157404, 157404, 67056, 438768, 1499348, 2296588, 1499348, 438768, 2752364, 14168952, 27034844, 27034844, 14168952, 2752364, 17963540, 135441648, 363809888, 506608980, 363809888 (list; table; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 COMMENTS Table starts ........256..........1644...........10700.............67056..............438768 .......1644.........16116..........157404...........1499348............14168952 ......10700........157404.........2296588..........27034844...........363809888 ......67056.......1499348........27034844.........506608980.........10213967484 .....438768......14168952.......363809888.......10213967484........323819924384 ....2752364.....135441648......4856507148......209604948500.......9500262069216 ...17963540....1301417096.....69678083388.....4182799295184.....300828077426994 ..112686608...12431472388....867711409148....82645994204968....9035028981379256 ..736140896..118450899788..11916017498904..1667663702267092..288763387135691996 .4617797164.1132038063428.155815394620052.34042629929788000.8588440332702563980 LINKS R. H. Hardin, Table of n, a(n) for n = 1..143 FORMULA Empirical for column k: k=1: a(n) = 23*a(n-2) +689*a(n-4) +1889*a(n-6) +1784*a(n-8) +512*a(n-10) for n>13 k=2: [order 20] for n>24 k=3: [order 60] for n>63 EXAMPLE Some solutions for n=2 k=4 ..1..0..1..0..3....0..1..0..0..3....1..1..2..2..0....1..1..2..0..2 ..2..0..1..2..0....2..1..0..2..1....1..0..2..1..2....2..1..3..1..0 ..3..1..2..1..1....2..2..0..3..3....2..2..3..1..1....2..0..2..3..0 CROSSREFS Sequence in context: A238148 A237927 A237922 * A238065 A237538 A237532 Adjacent sequences:  A238069 A238070 A238071 * A238073 A238074 A238075 KEYWORD nonn,tabl AUTHOR R. H. Hardin, Feb 17 2014 STATUS approved

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Last modified April 6 16:14 EDT 2020. Contains 333276 sequences. (Running on oeis4.)