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 A233949 T(n,k)=Number of (n+1)X(k+1) 0..2 arrays with every 2X2 subblock having the sum of the absolute values of the edge differences equal to 4 9
 44, 226, 226, 1150, 2108, 1150, 5874, 19484, 19484, 5874, 29970, 180972, 328508, 180972, 29970, 152974, 1679760, 5601514, 5601514, 1679760, 152974, 780718, 15596008, 95457842, 176523392, 95457842, 15596008, 780718, 3984650, 144797048 (list; table; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 COMMENTS Table starts ........44..........226............1150...............5874 .......226.........2108...........19484.............180972 ......1150........19484..........328508............5601514 ......5874.......180972.........5601514..........176523392 .....29970......1679760........95457842.........5575336614 ....152974.....15596008......1628628304.......176443282254 ....780718....144797048.....27781166008......5586328225626 ...3984650...1344358636....473979079512....176913068237196 ..20336682..12481572704...8086137608310...5603035961686288 .103793974.115884202944.137956079585788.177460847788244822 LINKS R. H. Hardin, Table of n, a(n) for n = 1..220 FORMULA Empirical for column k: k=1: a(n) = 5*a(n-1) +3*a(n-2) -13*a(n-3) +2*a(n-4) k=2: [order 10] k=3: [order 25] k=4: [order 70] EXAMPLE Some solutions for n=2 k=4 ..0..0..0..0..0....1..2..0..1..2....2..0..0..0..1....0..1..1..2..0 ..0..2..0..2..1....0..1..0..2..1....1..0..2..2..2....0..2..0..2..2 ..0..1..0..2..0....0..2..0..0..1....2..1..1..0..1....1..2..0..0..0 CROSSREFS Sequence in context: A122235 A250454 A250447 * A233942 A122245 A031175 Adjacent sequences:  A233946 A233947 A233948 * A233950 A233951 A233952 KEYWORD nonn,tabl AUTHOR R. H. Hardin, Dec 18 2013 STATUS approved

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Last modified November 29 15:46 EST 2021. Contains 349416 sequences. (Running on oeis4.)