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 A209796 T(n,k)=Half the number of (n+1)X(k+1) 0..2 arrays with every 2X2 subblock having exactly one duplicate clockwise edge difference 9
 30, 204, 204, 1380, 3171, 1380, 9348, 49056, 49056, 9348, 63300, 759642, 1732554, 759642, 63300, 428676, 11761044, 61289190, 61289190, 11761044, 428676, 2902980, 182095128, 2167312950, 4953638163, 2167312950, 182095128, 2902980, 19659012 (list; table; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 COMMENTS Table starts .......30.........204...........1380...............9348.................63300 ......204........3171..........49056.............759642..............11761044 .....1380.......49056........1732554...........61289190............2167312950 .....9348......759642.......61289190.........4953638163..........400252237467 ....63300....11761044.....2167312950.......400252237467........73890766377408 ...428676...182095128....76648760118.....32342700329739.....13642480312938969 ..2902980..2819342124..2710658447034...2613436161921981...2518750352620857312 .19659012.43651363500.95862567834618.211178329470822063.465030007730370004089 LINKS R. H. Hardin, Table of n, a(n) for n = 1..264 EXAMPLE Some solutions for n=4 k=3 ..1..1..0..1....0..1..2..0....0..1..0..2....1..2..2..1....0..2..2..0 ..2..2..2..1....1..1..2..0....2..2..0..1....2..2..1..1....0..1..0..0 ..1..1..0..0....0..1..1..0....2..0..0..1....2..1..1..0....1..1..2..2 ..2..0..0..1....0..1..2..2....2..1..0..1....1..1..0..0....1..2..2..0 ..0..0..1..1....2..2..2..0....1..1..2..2....1..2..0..2....1..2..1..1 CROSSREFS Sequence in context: A200548 A165030 A165016 * A209789 A280482 A203617 Adjacent sequences:  A209793 A209794 A209795 * A209797 A209798 A209799 KEYWORD nonn,tabl AUTHOR R. H. Hardin Mar 13 2012 STATUS approved

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Last modified September 26 11:15 EDT 2020. Contains 337358 sequences. (Running on oeis4.)