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 A209517 T(n,k) = Number of (n+1) X (k+1) 0..2 arrays with the number of clockwise edge increases in every 2 X 2 subblock equal to the number of counterclockwise edge increases. 6
 57, 363, 363, 2313, 4995, 2313, 14739, 68937, 68937, 14739, 93921, 951777, 2071311, 951777, 93921, 598491, 13141335, 62340543, 62340543, 13141335, 598491, 3813753, 181445643, 1876947141, 4099186545, 1876947141, 181445643, 3813753, 24302307 (list; table; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 COMMENTS Table starts .......57.........363...........2313.............14739.................93921 ......363........4995..........68937............951777..............13141335 .....2313.......68937........2071311..........62340543............1876947141 ....14739......951777.......62340543........4099186545..........269845393359 ....93921....13141335.....1876947141......269845393359........38883961392081 ...598491...181445643....56515446141....17769569448759......5607670578249789 ..3813753..2505266673..1701725703867..1170258116647953....808953988260058047 .24302307.34590865185.51240520677831.77072446894479573.116711118063701004591 LINKS R. H. Hardin, Table of n, a(n) for n = 1..220 EXAMPLE Some solutions for n=4, k=3: ..0..0..2..1....0..1..0..2....1..2..2..1....2..2..1..2....2..1..0..2 ..2..0..2..2....2..0..0..2....2..0..2..1....2..2..1..1....1..1..1..0 ..0..2..2..0....2..0..1..0....2..2..1..0....0..2..2..1....1..1..2..1 ..2..2..0..1....2..2..0..1....1..2..1..1....0..2..0..2....1..1..1..1 ..2..1..2..0....1..2..2..0....1..2..1..2....2..2..0..0....2..2..1..2 CROSSREFS Column 1 is 3*A138977(n+1). Column 2 is 3*A138978(n+1). Column 3 is 3*A138979(n+1). Sequence in context: A371515 A043399 A038482 * A097200 A211147 A237360 Adjacent sequences: A209514 A209515 A209516 * A209518 A209519 A209520 KEYWORD nonn,tabl AUTHOR R. H. Hardin, Mar 09 2012 STATUS approved

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Last modified July 22 15:50 EDT 2024. Contains 374540 sequences. (Running on oeis4.)