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A268993 Number of nX6 binary arrays with some element plus some horizontally or antidiagonally adjacent neighbor totalling two not more than once. 1
41, 763, 14080, 244397, 4097199, 66954420, 1073436321, 16957258387, 264744926212, 4093941136805, 62806688095479, 957111538353668, 14502245681077257, 218656000387543867, 3282569954305098964 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 6 of A268995.

LINKS

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

FORMULA

Empirical: a(n) = 42*a(n-1) -665*a(n-2) +5138*a(n-3) -21972*a(n-4) +55274*a(n-5) -83769*a(n-6) +76202*a(n-7) -40273*a(n-8) +11304*a(n-9) -1296*a(n-10) for n>12

EXAMPLE

Some solutions for n=3

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

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

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

CROSSREFS

Cf. A268995.

Sequence in context: A299552 A246642 A167737 * A125551 A087856 A010957

Adjacent sequences:  A268990 A268991 A268992 * A268994 A268995 A268996

KEYWORD

nonn

AUTHOR

R. H. Hardin, Feb 17 2016

STATUS

approved

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Last modified July 23 21:03 EDT 2021. Contains 346265 sequences. (Running on oeis4.)