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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

R. H. Hardin, Table of n, a(n) for n = 1..311

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

Adjacent sequences:  A206991 A206992 A206993 * A206995 A206996 A206997

KEYWORD

nonn,tabl

AUTHOR

R. H. Hardin Feb 14 2012

STATUS

approved

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Last modified September 27 20:35 EDT 2020. Contains 337388 sequences. (Running on oeis4.)