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A233928 T(n,k)=Number of (n+1)X(k+1) 0..4 arrays with every 2X2 subblock having the sum of the absolute values of the edge differences equal to 8 and no adjacent elements equal 9
98, 518, 518, 2792, 4010, 2792, 15230, 32496, 32496, 15230, 83290, 273318, 405004, 273318, 83290, 456328, 2325194, 5389600, 5389600, 2325194, 456328, 2500838, 19931860, 73564176, 117016814, 73564176, 19931860, 2500838, 13709358 (list; table; graph; refs; listen; history; text; internal format)
OFFSET
1,1
COMMENTS
Table starts
........98..........518...........2792.............15230................83290
.......518.........4010..........32496............273318..............2325194
......2792........32496.........405004...........5389600.............73564176
.....15230.......273318........5389600.........117016814...........2644508910
.....83290......2325194.......73564176........2644508910.........100717013560
....456328.....19931860.....1020495508.......61446631860........3988055755936
...2500838....171250610....14257498880.....1445209360978......161038431160850
..13709358...1473829746...200008938060....34277771102530.....6580045857814054
..75155340..12688761848..2811049435848...815537967438972...270517440197706674
.412023922.109290581878.39549756517288.19458666839438514.11161397147896311964
LINKS
FORMULA
Empirical for column k:
k=1: a(n) = 6*a(n-1) +5*a(n-2) -46*a(n-3) +5*a(n-4) +60*a(n-5) +20*a(n-6)
k=2: [order 25]
k=3: [order 82]
EXAMPLE
Some solutions for n=2 k=4
..3..4..2..4..3....1..0..3..2..4....2..4..3..4..1....1..0..1..0..2
..0..1..0..1..0....0..3..4..0..3....0..2..0..3..4....0..3..0..3..4
..2..4..3..0..3....1..0..2..1..4....3..4..2..4..1....3..4..3..4..1
CROSSREFS
Sequence in context: A263040 A263033 A239173 * A233921 A203083 A202370
KEYWORD
nonn,tabl
AUTHOR
R. H. Hardin, Dec 17 2013
STATUS
approved

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Last modified June 18 03:29 EDT 2024. Contains 373468 sequences. (Running on oeis4.)