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A200801
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T(n,k)=Number of nXk 0..3 arrays with values 0..3 introduced in row major order and each element equal to no more than two horizontal and vertical neighbors
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8
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1, 2, 2, 5, 15, 5, 15, 178, 178, 15, 51, 2614, 9880, 2614, 51, 187, 40148, 583813, 583813, 40148, 187, 715, 622645, 34679839, 132636590, 34679839, 622645, 715, 2795, 9676364, 2060918000, 30147154218, 30147154218, 2060918000, 9676364, 2795
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OFFSET
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1,2
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COMMENTS
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Table starts
.....1...........2.................5......................15
.....2..........15...............178....................2614
.....5.........178..............9880..................583813
....15........2614............583813...............132636590
....51.......40148..........34679839.............30147154218
...187......622645........2060918000...........6852264918471
...715.....9676364......122478253815........1557479347400065
..2795...150442627.....7278777317468......354005859128023982
.11051..2339207390...432571571252989....80463441477635545163
.43947.36372631268.25707362563355693.18288865135614195620421
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LINKS
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Ron Hardin, Table of n, a(n) for n = 1..97
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EXAMPLE
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Some solutions for n=5 k=3
..0..0..0....0..0..0....0..0..0....0..0..0....0..0..0....0..0..0....0..0..0
..0..1..0....0..1..0....0..1..0....0..1..0....0..1..0....0..1..0....0..1..0
..2..0..0....0..1..1....0..0..2....2..2..0....2..2..0....2..2..0....2..1..2
..2..3..3....1..0..2....3..1..0....1..1..1....3..2..2....0..0..1....0..1..3
..2..2..0....3..2..1....3..3..0....2..2..1....3..1..3....1..1..1....1..1..2
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CROSSREFS
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Column 1 is A007581(n-1)
Sequence in context: A112709 A208353 A208001 * A208408 A198528 A208466
Adjacent sequences: A200798 A200799 A200800 * A200802 A200803 A200804
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KEYWORD
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nonn,tabl
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AUTHOR
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R. H. Hardin Nov 22 2011
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STATUS
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approved
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