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A206994 T(n,k)=Number of nXk 0..1 arrays avoiding 0 0 0 horizontally and 1 1 1 vertically 7
2, 4, 4, 7, 16, 7, 13, 49, 49, 13, 24, 169, 174, 169, 24, 44, 576, 840, 840, 576, 44, 81, 1936, 3858, 6510, 3858, 1936, 81, 149, 6561, 17460, 46878, 46878, 17460, 6561, 149, 274, 22201, 80070, 329952, 516724, 329952, 80070, 22201, 274, 504, 75076, 365784 (list; table; graph; refs; listen; history; text; internal format)
OFFSET
1,1
COMMENTS
Table starts
...2.....4......7.......13........24..........44...........81............149
...4....16.....49......169.......576........1936.........6561..........22201
...7....49....174......840......3858.......17460........80070.........365784
..13...169....840.....6510.....46878......329952......2371090.......16939450
..24...576...3858....46878....516724.....5517786.....60684900......661767626
..44..1936..17460...329952...5517786....88819714...1482397764....24487141408
..81..6561..80070..2371090..60684900..1482397764..37849652838...954576893140
.149.22201.365784.16939450.661767626.24487141408.954576893140.36679559167444
LINKS
Shizuo Kaji, A Derouet-Jourdan, H Ochiai, Dappled tiling, arXiv preprint arXiv:1607.06138, 2016
EXAMPLE
Some solutions for n=4 k=3
..1..1..1....1..0..1....1..0..1....1..0..0....1..0..0....1..1..0....1..1..0
..0..0..1....1..0..1....1..0..0....0..0..1....1..0..1....1..0..1....1..1..1
..0..1..0....0..1..0....0..1..1....0..1..0....0..0..1....0..1..1....0..0..1
..1..0..1....0..1..0....0..0..1....0..0..1....1..0..0....1..1..0....1..1..0
CROSSREFS
Column 1 is A000073(n+3)
Column 2 is A085697(n+1)
Sequence in context: A206871 A207088 A207182 * A181224 A188567 A262274
KEYWORD
nonn,tabl
AUTHOR
R. H. Hardin Feb 14 2012
STATUS
approved

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Last modified July 24 20:30 EDT 2024. Contains 374585 sequences. (Running on oeis4.)