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 A218638 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 11
 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 (list; table; graph; refs; listen; history; text; internal format)
 OFFSET 1,2 COMMENTS 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 LINKS R. H. Hardin, Table of n, a(n) for n = 1..111 EXAMPLE 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 CROSSREFS Column 2 is A218190 Row 1 is A218189 Row 2 is A218236 Row 3 is A218237 Sequence in context: A194595 A219063 A218810 * A232295 A228763 A101845 Adjacent sequences: A218635 A218636 A218637 * A218639 A218640 A218641 KEYWORD nonn,tabl AUTHOR R. H. Hardin Nov 03 2012 STATUS approved

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Last modified August 11 10:50 EDT 2024. Contains 375068 sequences. (Running on oeis4.)