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 A208096 T(n,k)=Number of n X k nonnegative integer arrays with new values 0 upwards introduced in row major order and no element equal to any horizontal, diagonal or antidiagonal neighbor (colorings ignoring permutations of colors). 10
 1, 1, 2, 2, 4, 5, 5, 30, 34, 15, 15, 377, 1573, 500, 52, 52, 7239, 169064, 192328, 10900, 203, 203, 193228, 34438557, 235862938, 43366459, 322768, 877, 877, 6752442, 11535531783, 677352910013, 746823293346, 15769674462, 12297768, 4140 (list; table; graph; refs; listen; history; text; internal format)
 OFFSET 1,3 LINKS Andrew Howroyd, Table of n, a(n) for n = 1..210 (terms 1..39 from R. H. Hardin). EXAMPLE Table starts ....1........1...........2............5...........15..........52...........203 ....2........4..........30..........377.........7239......193228.......6752442 ....5.......34........1573.......169064.....34438557.11535531783.5804338800147 ...15......500......192328....235862938.677352910013 ...52....10900....43366459.746823293346 ..203...322768.15769674462 ..877.12297768 .4140 Some solutions for n=4 k=3 ..0..1..2....0..1..0....0..1..0....0..1..2....0..1..2....0..1..0....0..1..0 ..0..1..2....2..1..0....0..1..0....0..3..2....0..3..0....2..3..0....0..1..0 ..0..1..0....3..1..2....2..1..0....0..1..0....0..1..0....0..3..0....2..1..2 ..0..1..0....2..1..0....2..1..2....3..1..0....0..3..0....0..1..0....0..1..0 CROSSREFS Columns 1..5 are A000110, A207864, A208093, A208094, A208095. Rows 1..5 are A000110(n-1), A208097, A208098, A208099, A208100. Main diagonal is A361449. Cf. A207868. Sequence in context: A325325 A240851 A261665 * A049269 A085085 A121600 Adjacent sequences: A208093 A208094 A208095 * A208097 A208098 A208099 KEYWORD nonn,tabl AUTHOR R. H. Hardin, Feb 23 2012 STATUS approved

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Last modified June 23 01:58 EDT 2024. Contains 373629 sequences. (Running on oeis4.)