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A202798 Number of nX4 binary arrays with every one adjacent to another one horizontally or vertically 1
7, 126, 1718, 22946, 311144, 4217066, 57127796, 773948962, 10485233258, 142050385280, 1924452482144, 26071860295098, 353213105139604, 4785216541174944, 64828561353680056, 878276318748587482 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 4 of A202802

LINKS

R. H. Hardin, Table of n, a(n) for n = 1..210

FORMULA

Empirical: a(n) = 13*a(n-1) -7*a(n-2) +181*a(n-3) +123*a(n-4) +940*a(n-5) +545*a(n-6) -2084*a(n-7) -1964*a(n-8) +1512*a(n-9) +1984*a(n-10) -512*a(n-11) -1024*a(n-12)

EXAMPLE

Some solutions for n=4

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

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

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

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

CROSSREFS

Sequence in context: A113162 A180583 A295412 * A204248 A084940 A246648

Adjacent sequences:  A202795 A202796 A202797 * A202799 A202800 A202801

KEYWORD

nonn

AUTHOR

R. H. Hardin Dec 24 2011

STATUS

approved

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Last modified February 16 21:59 EST 2019. Contains 320200 sequences. (Running on oeis4.)