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A198408
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T(n,k) = Number of 2n X 2k 0..4 arrays with values 0..4 introduced in row major order and each element equal to exactly one horizontal and vertical neighbor.
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4
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2, 17, 17, 377, 6986, 377, 11473, 5057327, 5057327, 11473, 375273, 3850206168, 85013617830, 3850206168, 375273, 12456897, 2970439193698, 1506130430723528, 1506130430723528, 2970439193698, 12456897, 414711897, 2302126761338667
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OFFSET
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1,1
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COMMENTS
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Table starts:
........2............17..............377............11473...............375273
.......17..........6986..........5057327.......3850206168........2970439193698
......377.......5057327......85013617830.1506130430723528.27330079651426584414
....11473....3850206168.1506130430723528
...375273.2970439193698
.12456897
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LINKS
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EXAMPLE
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Some solutions for n=2, k=2:
..0..0..1..1....0..1..2..2....0..0..1..1....0..1..2..3....0..0..1..1
..1..1..0..0....0..1..3..4....2..2..3..3....0..1..2..3....2..2..3..3
..2..3..3..4....4..0..3..4....3..1..1..2....1..3..0..4....1..3..2..2
..2..0..0..4....4..0..2..2....3..0..0..2....1..3..0..4....1..3..4..4
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CROSSREFS
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KEYWORD
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AUTHOR
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STATUS
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approved
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