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 A217273 T(n,k)=Number of nXk arrays of occupancy after each element moves to some horizontal or vertical neighbor 7
 0, 1, 1, 2, 9, 2, 4, 64, 64, 4, 8, 441, 1472, 441, 8, 16, 3025, 33856, 33856, 3025, 16, 32, 20736, 772800, 2572816, 772800, 20736, 32, 64, 142129, 17640000, 194881600, 194881600, 17640000, 142129, 64, 128, 974169, 402494400, 14755689729 (list; table; graph; refs; listen; history; text; internal format)
 OFFSET 1,4 COMMENTS Table starts ....0..........1...............2..................4.....................8 ....1..........9..............64................441..................3025 ....2.........64............1472..............33856................772800 ....4........441...........33856............2572816.............194881600 ....8.......3025..........772800..........194881600...........48909857500 ...16......20736........17640000........14755689729........12276607432401 ...32.....142129.......402494400......1117092569476......3080781263731464 ...64.....974169......9183772224.....84567501131481....773143936621737444 ..128....6677056....209543184576...6401965110822961.194021789111058265560 ..256...45765225...4781079618624.484642857129680209 ..512..313679521.109088244863424 .1024.2149991424 LINKS R. H. Hardin, Table of n, a(n) for n = 1..97 EXAMPLE Some solutions for n=3 k=4 ..0..1..0..2....0..2..2..1....0..2..2..1....1..0..0..1....1..0..1..1 ..1..1..2..2....1..0..1..1....1..2..1..0....1..1..1..1....3..1..2..0 ..2..0..1..0....1..1..2..0....0..1..2..0....0..2..3..1....1..0..2..0 CROSSREFS Column 2 is A049684 Sequence in context: A153460 A248695 A221139 * A188981 A277754 A112537 Adjacent sequences:  A217270 A217271 A217272 * A217274 A217275 A217276 KEYWORD nonn,tabl AUTHOR R. H. Hardin Sep 29 2012 STATUS approved

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Last modified January 19 05:31 EST 2019. Contains 319304 sequences. (Running on oeis4.)