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 A237936 T(n,k)=Number of (n+1)X(k+1) 0..3 arrays with the upper median plus the lower median minus the minimum of every 2X2 subblock differing from its horizontal and vertical neighbors by exactly one 6
 256, 1718, 1718, 11701, 19694, 11701, 81402, 228866, 228866, 81402, 563166, 2744048, 4554824, 2744048, 563166, 3880918, 32465580, 94068938, 94068938, 32465580, 3880918, 26804881, 383375880, 1903243716, 3422869862, 1903243716 (list; table; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 COMMENTS Table starts ........256.........1718..........11701...........81402..........563166 .......1718........19694.........228866.........2744048........32465580 ......11701.......228866........4554824........94068938......1903243716 ......81402......2744048.......94068938......3422869862....120261272346 .....563166.....32465580.....1903243716....120261272346...7270062501162 ....3880918....383375880....38477471800...4232660312790.440610763676048 ...26804881...4542257982...782578367787.149839687112404 ..185489824..54067139244.16010421948796 .1282099556.641031056118 .8852862392 LINKS R. H. Hardin, Table of n, a(n) for n = 1..60 FORMULA Empirical for column k: k=1: [linear recurrence of order 36] EXAMPLE Some solutions for n=2 k=4 ..0..3..2..1..3....0..1..2..0..0....0..2..2..1..2....0..0..0..1..2 ..0..2..1..0..0....0..2..1..2..2....0..3..3..1..1....2..2..1..3..0 ..2..1..2..0..3....0..2..3..3..1....2..1..2..0..3....3..1..0..2..0 CROSSREFS Sequence in context: A237532 A237175 A237169 * A237931 A237494 A237489 Adjacent sequences:  A237933 A237934 A237935 * A237937 A237938 A237939 KEYWORD nonn,tabl AUTHOR R. H. Hardin, Feb 16 2014 STATUS approved

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Last modified December 4 09:35 EST 2020. Contains 338923 sequences. (Running on oeis4.)