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 A208709 T(n,k)=Number of nXk 0..1 arrays with new values 0..1 introduced in row major order and no element equal to more than two of its immediate leftward or upward or right-upward antidiagonal neighbors 12
 1, 2, 2, 4, 8, 4, 8, 28, 32, 8, 16, 100, 196, 128, 16, 32, 356, 1268, 1372, 512, 32, 64, 1268, 8128, 16084, 9604, 2048, 64, 128, 4516, 52184, 185344, 204020, 67228, 8192, 128, 256, 16084, 334948, 2142580, 4226368, 2587924, 470596, 32768, 256, 512, 57284, 2149988 (list; table; graph; refs; listen; history; text; internal format)
 OFFSET 1,2 COMMENTS Table starts ...1.....2.......4.........8..........16............32..............64 ...2.....8......28.......100.........356..........1268............4516 ...4....32.....196......1268........8128.........52184..........334948 ...8...128....1372.....16084......185344.......2142580........24754628 ..16...512....9604....204020.....4226368......87985748......1830045552 ..32..2048...67228...2587924....96373248....3613193828....135288700496 ..64..8192..470596..32826932..2197585152..148378294612..10001404535216 .128.32768.3294172.416398420.50111214592.6093257064980.739367693888784 LINKS R. H. Hardin, Table of n, a(n) for n = 1..631 EXAMPLE Some solutions for n=4 k=3 ..0..1..1....0..1..0....0..0..0....0..0..1....0..0..1....0..1..0....0..1..0 ..1..0..0....0..0..0....0..1..1....0..0..0....0..1..1....0..0..0....1..0..0 ..1..0..1....0..1..1....1..0..1....1..1..1....0..0..0....1..1..1....1..0..1 ..1..1..1....0..1..1....0..1..0....0..0..0....0..1..0....1..0..0....1..1..0 CROSSREFS Column 2 is A004171(n-1) Row 2 is A104934 Sequence in context: A300267 A318016 A320402 * A300472 A326105 A300811 Adjacent sequences: A208706 A208707 A208708 * A208710 A208711 A208712 KEYWORD nonn,tabl AUTHOR R. H. Hardin Mar 01 2012 STATUS approved

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Last modified September 22 11:59 EDT 2023. Contains 365531 sequences. (Running on oeis4.)