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 A229847 T(n,k)=Number of nXk 0..2 arrays x(i,j) with each element horizontally or vertically next to at least one element with value 2-x(i,j) 8
 0, 3, 3, 3, 15, 3, 9, 81, 81, 9, 15, 423, 987, 423, 15, 33, 2247, 13401, 13401, 2247, 33, 63, 11925, 178311, 453837, 178311, 11925, 63, 129, 63291, 2381469, 15269193, 15269193, 2381469, 63291, 129, 255, 335943, 31783299, 514371027, 1296261759, 514371027 (list; table; graph; refs; listen; history; text; internal format)
 OFFSET 1,2 COMMENTS Table starts ...0......3.........3............9..............15..................33 ...3.....15........81..........423............2247...............11925 ...3.....81.......987........13401..........178311.............2381469 ...9....423.....13401.......453837........15269193...........514371027 ..15...2247....178311.....15269193......1296261759........110203382331 ..33..11925...2381469....514371027....110203382331......23643209345079 ..63..63291..31783299..17324310663...9366963651897....5071373978989773 .129.335943.424240833.583513743897.796197119067381.1087831682400037245 LINKS R. H. Hardin, Table of n, a(n) for n = 1..112 FORMULA Empirical for column k: k=1: a(n) = a(n-1) +2*a(n-2) k=2: a(n) = 5*a(n-1) +2*a(n-2) -a(n-3) -5*a(n-4) k=3: [order 15] k=4: [order 53] EXAMPLE Some solutions for n=3 k=4 ..0..1..2..0....1..1..0..1....1..1..2..0....1..1..1..1....1..1..1..2 ..2..1..1..1....2..2..2..1....1..2..1..1....1..0..2..0....0..2..0..0 ..1..1..2..0....0..0..2..1....1..0..0..2....0..2..1..1....2..1..1..1 CROSSREFS Column 1 is A062510(n-1) Sequence in context: A335518 A269347 A183554 * A196529 A110668 A176248 Adjacent sequences:  A229844 A229845 A229846 * A229848 A229849 A229850 KEYWORD nonn,tabl AUTHOR R. H. Hardin, Oct 01 2013 STATUS approved

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Last modified November 28 09:51 EST 2021. Contains 349401 sequences. (Running on oeis4.)