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 A215847 T(n,k)=Number of horizontal, vertical, diagonal and antidiagonal neighbor colorings of the even squares of an nXk array with new integer colors introduced in row major order 7
 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 2, 2, 4, 2, 2, 2, 5, 8, 8, 5, 2, 5, 15, 102, 78, 102, 15, 5, 5, 52, 364, 1250, 1250, 364, 52, 5, 15, 203, 8460, 29084, 159712, 29084, 8460, 203, 15, 15, 877, 40612, 908408, 4851360, 4851360, 908408, 40612, 877, 15, 52, 4140, 1440676 (list; table; graph; refs; listen; history; text; internal format)
 OFFSET 1,11 COMMENTS Table starts ..1.....1.......1..........1...........2............2............5 ..1.....1.......1..........2...........5...........15...........52 ..1.....1.......4..........8.........102..........364.........8460 ..1.....2.......8.........78........1250........29084.......908408 ..2.....5.....102.......1250......159712......4851360...1590366402 ..2....15.....364......29084.....4851360...1396243937.621070325112 ..5....52....8460.....908408..1590366402.621070325112 ..5...203...40612...36224616.83943993818 .15...877.1440676.1780689974 .15..4140.8520924 .52.21147 .52 LINKS R. H. Hardin, Table of n, a(n) for n = 1..84 EXAMPLE Some solutions for n=3 k=4 ..0..x..1..x....0..x..1..x....0..x..1..x....0..x..1..x....0..x..1..x ..x..2..x..3....x..2..x..0....x..2..x..3....x..2..x..3....x..2..x..0 ..3..x..4..x....1..x..3..x....4..x..5..x....4..x..0..x....3..x..4..x CROSSREFS Column 2 is A000110(n-2) Column 4 is A215741 Column 6 is A215743 Sequence in context: A279047 A063086 A077636 * A057000 A328400 A239676 Adjacent sequences:  A215844 A215845 A215846 * A215848 A215849 A215850 KEYWORD nonn,tabl AUTHOR R. H. Hardin Aug 24 2012 STATUS approved

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Last modified June 13 13:31 EDT 2021. Contains 344999 sequences. (Running on oeis4.)