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 A218372 T(n,k)=Hilltop maps: number of nXk binary arrays indicating the locations of corresponding elements not exceeded by any horizontal, vertical or antidiagonal neighbor in a random 0..3 nXk array 8
 1, 3, 3, 7, 15, 7, 15, 63, 63, 15, 29, 253, 509, 253, 29, 57, 1009, 4081, 4081, 1009, 57, 113, 4033, 32641, 65409, 32641, 4033, 113, 225, 16129, 261121, 1046529, 1046529, 261121, 16129, 225, 449, 64511, 2088955, 16744435, 33488029, 16744435, 2088955 (list; table; graph; refs; listen; history; text; internal format)
 OFFSET 1,2 COMMENTS Table starts ....1........3...........7..............15................29 ....3.......15..........63.............253..............1009 ....7.......63.........509............4081.............32641 ...15......253........4081...........65409...........1046529 ...29.....1009.......32641.........1046529..........33488029 ...57.....4033......261121........16744435........1071613317 ..113....16129.....2088955.......267910753.......34291593409 ..225....64511....16711551......4286570153.....1097330469185 ..449...258015...133691649.....68585092161....35114559214497 ..895..1031935..1069527065...1097360991969..1123665390953149 .1783..4127233..8556167553..17557768153359.35957276389513409 .3551.16506913.68448948737.280924166963785 LINKS R. H. Hardin, Table of n, a(n) for n = 1..127 EXAMPLE Some solutions for n=3 k=4 ..1..0..1..0....0..1..1..1....0..1..1..1....0..0..1..0....1..0..0..0 ..0..1..1..1....1..1..1..1....0..1..0..0....1..0..1..1....1..0..0..1 ..1..0..0..0....0..1..0..1....1..1..0..0....0..0..0..0....0..1..0..0 CROSSREFS Column 1 is A218189 Sequence in context: A218233 A218319 A218196 * A218242 A218288 A056420 Adjacent sequences:  A218369 A218370 A218371 * A218373 A218374 A218375 KEYWORD nonn,tabl AUTHOR R. H. Hardin Oct 27 2012 STATUS approved

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Last modified January 24 09:43 EST 2022. Contains 350534 sequences. (Running on oeis4.)