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 A230757 T(n,k)=Number of (n+3)X(k+3) 0..2 arrays x(i,j) with each element diagonally or antidiagonally next to at least one element with value (x(i,j)+1) mod 3, and upper left element zero 9
 12, 192, 192, 2700, 5544, 2700, 31212, 178608, 178608, 31212, 363312, 4838400, 13305708, 4838400, 363312, 4120752, 129731328, 820317888, 820317888, 129731328, 4120752, 46949808, 3423037464, 51048476748, 116879941620, 51048476748 (list; table; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 COMMENTS Table starts .......12.........192............2700..............31212................363312 ......192........5544..........178608............4838400.............129731328 .....2700......178608........13305708..........820317888...........51048476748 ....31212.....4838400.......820317888.......116879941620........17027460691212 ...363312...129731328.....51048476748.....17027460691212......5769362600920812 ..4120752..3423037464...3154520054700...2446111719135732...1928867953682733132 .46949808.90231813552.194576103540300.350956390609736652.645610139671314494208 LINKS R. H. Hardin, Table of n, a(n) for n = 1..180 FORMULA Empirical for column k: k=1: [order 15] k=2: [order 36] T(n,k)=3*A230708(n,k)*A230739(n,k) EXAMPLE Some solutions for n=1 k=4 ..0..0..2..2..0..0..0....0..2..0..0..1..1..2....0..1..0..2..1..0..2 ..1..1..0..0..1..1..2....0..1..2..2..1..0..2....2..1..0..2..1..0..2 ..0..2..0..1..1..0..2....0..1..2..2..1..0..2....0..0..2..2..1..0..2 ..1..2..0..2..2..0..2....0..2..0..0..1..0..2....2..2..1..0..2..0..2 CROSSREFS Sequence in context: A294409 A239776 A071990 * A196483 A196716 A086948 Adjacent sequences: A230754 A230755 A230756 * A230758 A230759 A230760 KEYWORD nonn,tabl AUTHOR R. H. Hardin, Oct 29 2013 STATUS approved

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Last modified August 3 13:10 EDT 2024. Contains 374893 sequences. (Running on oeis4.)