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 A237779 T(n,k)=Number of (n+1)X(k+1) 0..2 arrays with the maximum plus the upper median of every 2X2 subblock differing from its horizontal and vertical neighbors by exactly one 9
 81, 300, 300, 1176, 1456, 1176, 4480, 7220, 7220, 4480, 17768, 34738, 44224, 34738, 17768, 67152, 168120, 241036, 241036, 168120, 67152, 263504, 843310, 1618456, 2255544, 1618456, 843310, 263504, 1002432, 4176684, 10751680, 21945828 (list; table; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 COMMENTS Table starts .......81.......300........1176..........4480...........17768.............67152 ......300......1456........7220.........34738..........168120............843310 .....1176......7220.......44224........241036.........1618456..........10751680 .....4480.....34738......241036.......2255544........21945828.........224887166 ....17768....168120.....1618456......21945828.......331842772........4904397000 ....67152....843310....10751680.....224887166......4904397000......117723591636 ...263504...4176684....75418228....2190136632.....76440691940.....2748357091956 ..1002432..20234876...465173744...22128390502...1155901368104....65728872219894 ..3967808..98488592..3176256972..219294978892..18071506440724..1499406107437504 .15017792.490709904.21049234848.2263239636542.271890411395784.36564928000148830 LINKS R. H. Hardin, Table of n, a(n) for n = 1..264 FORMULA Empirical for column k: k=1: a(n) = 188*a(n-4) +512*a(n-6) +336*a(n-8) -64*a(n-10) for n>13 k=2: [order 20] for n>22 k=3: [order 50] for n>55 EXAMPLE Some solutions for n=3 k=4 ..1..0..0..0..1....0..0..2..0..2....0..0..1..2..0....0..1..2..1..0 ..0..0..2..1..0....1..2..1..1..2....1..1..2..0..1....1..0..0..2..0 ..1..1..1..2..1....2..0..1..0..0....1..2..0..1..0....2..1..1..1..2 ..2..1..0..0..2....1..1..1..2..2....2..1..1..0..0....1..2..0..1..0 CROSSREFS Sequence in context: A235947 A237809 A237802 * A237772 A236819 A237099 Adjacent sequences: A237776 A237777 A237778 * A237780 A237781 A237782 KEYWORD nonn,tabl AUTHOR R. H. Hardin, Feb 13 2014 STATUS approved

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Last modified March 23 03:46 EDT 2023. Contains 361434 sequences. (Running on oeis4.)