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 A209787 T(n,k)=Half the number of (n+1)X(k+1) 0..3 arrays with every 2X2 subblock having exactly one duplicate clockwise edge difference 9
 64, 576, 576, 5074, 12492, 5074, 44948, 266126, 266126, 44948, 397734, 5719838, 13606964, 5719838, 397734, 3520628, 122871278, 706149734, 706149734, 122871278, 3520628, 31161462, 2641341716, 36572974507, 89046135210, 36572974507 (list; table; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 COMMENTS Table starts ........64...........576.............5074................44948 .......576.........12492...........266126..............5719838 ......5074........266126.........13606964............706149734 .....44948.......5719838........706149734..........89046135210 ....397734.....122871278......36572974507.......11197401806412 ...3520628....2641341716....1896474527890.....1410846309824300 ..31161462...56780957220...98317767405921...177700386195973368 .275819644.1220714555712.5097617301286476.22387171143190946674 LINKS R. H. Hardin, Table of n, a(n) for n = 1..144 EXAMPLE Some solutions for n=4 k=3 ..2..1..2..3....1..3..3..3....1..0..0..1....0..2..2..1....2..0..2..0 ..0..1..2..1....1..3..1..3....1..0..1..1....0..0..1..1....1..0..0..0 ..0..1..3..1....3..3..1..1....1..1..1..2....1..0..0..0....2..2..2..1 ..2..1..3..1....1..3..2..3....1..2..1..0....1..2..0..3....1..3..2..0 ..2..1..1..1....1..1..1..1....3..2..0..0....3..0..0..0....3..3..1..1 CROSSREFS Sequence in context: A247929 A070054 A265636 * A247841 A209780 A330831 Adjacent sequences: A209784 A209785 A209786 * A209788 A209789 A209790 KEYWORD nonn,tabl AUTHOR R. H. Hardin Mar 13 2012 STATUS approved

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Last modified July 19 22:34 EDT 2024. Contains 374441 sequences. (Running on oeis4.)