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A203443
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T(n,k)=Number of nXk 0..7 arrays with every nonzero element less than or equal to at least two horizontal and vertical neighbors
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8
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1, 1, 1, 1, 8, 1, 1, 64, 64, 1, 1, 372, 4124, 372, 1, 1, 2528, 142108, 142108, 2528, 1, 1, 21988, 4401184, 24278164, 4401184, 21988, 1, 1, 186348, 168492336, 3216740482, 3216740482, 168492336, 186348, 1, 1, 1484834, 6975234574, 482229769194
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OFFSET
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1,5
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COMMENTS
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Table starts
.1.......1............1..............1................1................1
.1.......8...........64............372.............2528............21988
.1......64.........4124.........142108..........4401184........168492336
.1.....372.......142108.......24278164.......3216740482.....482229769194
.1....2528......4401184.....3216740482....1842430382222.1163067191357930
.1...21988....168492336...482229769194.1163067191357930
.1..186348...6975234574.79772073060022
.1.1484834.276131799334
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LINKS
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EXAMPLE
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Some solutions for n=5 k=3
..4..5..5....5..5..3....4..4..4....7..7..2....6..6..0....2..4..4....3..3..0
..4..7..7....5..5..3....7..7..6....7..7..5....6..7..7....2..4..4....3..4..4
..4..7..7....4..2..1....7..7..7....0..7..5....7..7..7....7..7..7....1..7..7
..2..6..6....4..4..1....4..7..7....3..7..7....7..3..7....7..6..7....0..7..7
..0..6..6....4..4..0....3..3..0....3..7..7....7..7..7....7..7..7....0..1..1
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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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