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A218638
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T(n,k)=Hilltop maps: number of nXk binary arrays indicating the locations of corresponding elements not exceeded by any horizontal, diagonal or antidiagonal neighbor in a random 0..3 nXk array
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11
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1, 3, 1, 7, 15, 1, 15, 63, 63, 1, 29, 255, 511, 251, 1, 57, 1017, 4095, 4087, 1001, 1, 113, 4065, 32753, 65523, 32689, 4001, 1, 225, 16257, 262017, 1048363, 1048353, 261505, 16001, 1, 449, 65025, 2096129, 16773477, 33546641, 16773633, 2092027, 63985, 1
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OFFSET
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1,2
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COMMENTS
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Table starts
.1........3...........7.............15...............29................57
.1.......15..........63............255.............1017..............4065
.1.......63.........511...........4095............32753............262017
.1......251........4087..........65523..........1048363..........16773477
.1.....1001.......32689........1048353.........33546641........1073471633
.1.....4001......261505.......16773633.......1073490145.......68702054721
.1....16001.....2092027......268378101......34351677143.....4396930705721
.1....63985....16736081.....4294049121....1099253514899...281403528942981
.1...255867...133887639....68704778799...35176108628465.18009823835462025
.1..1023171..1071093011..1099276346403.1125635352180227
.1..4091495..8568679227.17588419711983
.1.16361227.68548914887
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LINKS
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EXAMPLE
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Some solutions for n=3 k=4
..0..1..1..1....0..1..0..0....0..1..1..1....0..0..1..0....1..0..0..0
..1..1..1..1....0..0..1..0....0..1..1..1....1..0..1..1....0..0..0..0
..1..1..0..0....1..0..1..1....1..0..1..1....1..0..1..1....1..1..0..0
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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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