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A217637
T(n,k)=Number of nXk arrays of the minimum value of corresponding elements and their horizontal and vertical neighbors in a random 0..1 nXk array
8
2, 2, 2, 4, 6, 4, 6, 16, 16, 6, 10, 38, 66, 38, 10, 16, 98, 244, 244, 98, 16, 26, 244, 968, 1418, 968, 244, 26, 42, 614, 3726, 8706, 8706, 3726, 614, 42, 68, 1542, 14520, 52120, 83074, 52120, 14520, 1542, 68, 110, 3872, 56352, 315378, 773348, 773348, 315378
OFFSET
1,1
COMMENTS
Number of maximal independent sets in the graph P_2 X P_n X P_k. - Andrew Howroyd, Jun 10 2017
LINKS
MacKenzie Carr, Christina M. Mynhardt, Ortrud R. Oellermann, Enumerating the Digitally Convex Sets of Powers of Cycles and Cartesian Products of Paths and Complete Graphs, arXiv:2008.02781 [math.CO], 2020.
R. Euler, P. Oleksik, Z. Skupien, Counting Maximal Distance-Independent Sets in Grid Graphs, Discussiones Mathematicae Graph Theory. Volume 33, Issue 3, Pages 531-557, ISSN (Print) 2083-5892, July 2013; see also.
EXAMPLE
Table starts
...2.....2........4..........6...........10..............16................26
...2.....6.......16.........38...........98.............244...............614
...4....16.......66........244..........968............3726.............14520
...6....38......244.......1418.........8706...........52120............315378
..10....98......968.......8706........83074..........773348...........7272142
..16...244.....3726......52120.......773348........11181454.........163361868
..26...614....14520.....315378......7272142.......163361868........3709621842
..42..1542....56352....1900838.....68138974......2378097084.......83923710538
..68..3872...218978...11472148....639248556.....34661572702.....1901055652804
.110..9726...850620...69210290...5994907930....505010822224....43046530809006
.178.24426..3304624..417586442..56226693158...7358779655656...974841850791586
.288.61348.12837742.2519466108.527340415924.107224919634686.22075731493018104
...
Some solutions for n=3 k=4
..1..0..0..1....0..0..0..1....1..0..1..1....1..1..0..0....1..0..0..0
..0..0..0..0....0..0..1..1....0..0..0..1....0..0..1..0....1..1..0..0
..1..0..0..0....0..0..0..1....1..0..1..1....0..0..0..1....1..0..0..0
CROSSREFS
Columns 1-3 are A006355(n+1), A217631, A217632.
Cf. A197054.
Sequence in context: A222177 A342271 A240433 * A231515 A231544 A086420
KEYWORD
nonn,tabl
AUTHOR
R. H. Hardin, Oct 09 2012
STATUS
approved