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A202802 T(n,k)=Number of nXk binary arrays with every one adjacent to another one horizontally or vertically 7
1, 2, 2, 4, 10, 4, 7, 36, 36, 7, 12, 126, 250, 126, 12, 21, 454, 1718, 1718, 454, 21, 37, 1632, 11988, 22946, 11988, 1632, 37, 65, 5854, 83518, 311144, 311144, 83518, 5854, 65, 114, 21010, 581518, 4217066, 8222576, 4217066, 581518, 21010, 114, 200, 75412 (list; table; graph; refs; listen; history; text; internal format)
OFFSET

1,2

COMMENTS

Table starts

...1......2.........4............7..............12................21

...2.....10........36..........126.............454..............1632

...4.....36.......250.........1718...........11988.............83518

...7....126......1718........22946..........311144...........4217066

..12....454.....11988.......311144.........8222576.........217145076

..21...1632.....83518......4217066.......217145076.......11168045764

..37...5854....581518.....57127796......5730640104......573985849362

..65..21010...4049700....773948962....151245101550....29502860015392

.114..75412..28202318..10485233258...3991784606164..1516477156642474

.200.270662.196400270.142050385280.105354316048660.77948189988273490

LINKS

R. H. Hardin, Table of n, a(n) for n = 1..420

EXAMPLE

Some solutions for n=5 k=3

..0..0..0....0..1..0....0..0..0....0..0..0....1..1..1....1..1..0....0..1..1

..1..0..0....0..1..0....0..0..0....1..1..1....1..1..1....0..1..1....1..1..1

..1..1..0....1..0..0....1..1..1....1..0..1....0..0..0....1..1..0....0..1..0

..1..1..1....1..1..1....1..0..1....1..0..0....1..1..1....1..1..0....0..0..0

..1..1..0....0..0..1....1..0..0....1..1..0....0..0..1....0..0..0....1..1..1

CROSSREFS

Column 1 is A005251(n+2)

Diagonal is A134262

Sequence in context: A220259 A220323 A295416 * A059473 A240629 A162508

Adjacent sequences:  A202799 A202800 A202801 * A202803 A202804 A202805

KEYWORD

nonn,tabl

AUTHOR

R. H. Hardin Dec 24 2011

STATUS

approved

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Last modified September 18 05:32 EDT 2019. Contains 327165 sequences. (Running on oeis4.)