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 A234161 T(n,k)=Number of (n+1)X(k+1) 0..3 arrays with every 2X2 subblock having the absolute values of all six edge and diagonal differences no larger than 1 9
 46, 226, 226, 1108, 2210, 1108, 5446, 21428, 21428, 5446, 26794, 208530, 411712, 208530, 26794, 131896, 2031286, 7952532, 7952532, 2031286, 131896, 649450, 19801468, 153793284, 305867942, 153793284, 19801468, 649450, 3198322 (list; table; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 COMMENTS Table starts .......46.........226...........1108..............5446................26794 ......226........2210..........21428............208530..............2031286 .....1108.......21428.........411712...........7952532............153793284 .....5446......208530........7952532.........305867942..........11788446834 ....26794.....2031286......153793284.......11788446834.........906740091154 ...131896....19801468.....2976757624......454899880956.......69879798953496 ...649450...193116778....57647946980....17566272589090.....5391006112450218 ..3198322..1883946390..1116833738020...678657896630666...416172275582037586 .15751828.18382182848.21642612331360.26228432144965180.32142152588267208940 LINKS R. H. Hardin, Table of n, a(n) for n = 1..264 FORMULA Empirical for column k: k=1: a(n) = 7*a(n-1) -9*a(n-2) -6*a(n-3) k=2: a(n) = 16*a(n-1) -59*a(n-2) -31*a(n-3) +118*a(n-4) +35*a(n-5) -10*a(n-6) k=3: [order 11] k=4: [order 26] k=5: [order 53] EXAMPLE Some solutions for n=2 k=4 ..0..1..1..2..2....1..2..1..1..2....0..1..1..1..1....0..0..0..1..0 ..1..1..1..1..2....1..1..1..1..1....1..0..1..0..0....1..0..1..1..1 ..1..1..2..2..2....0..1..1..1..1....0..0..1..0..0....0..0..0..1..1 CROSSREFS Sequence in context: A235550 A083358 A254229 * A234154 A251410 A251403 Adjacent sequences: A234158 A234159 A234160 * A234162 A234163 A234164 KEYWORD nonn,tabl AUTHOR R. H. Hardin, Dec 20 2013 STATUS approved

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Last modified March 29 22:15 EDT 2023. Contains 361599 sequences. (Running on oeis4.)