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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).

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

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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