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A282857 Number of nX3 0..1 arrays with no 1 equal to more than one of its horizontal, vertical and antidiagonal neighbors. 1
7, 31, 131, 583, 2562, 11250, 49471, 217459, 955873, 4201865, 18470437, 81191949, 356902120, 1568863280, 6896378669, 30314967625, 133257945179, 585772685663, 2574928188347, 11318819287751, 49755045854138, 218712263620846 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 3 of A282862.

LINKS

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

FORMULA

Empirical: a(n) = a(n-1) +9*a(n-2) +20*a(n-3) +23*a(n-4) +15*a(n-5) +5*a(n-6) -3*a(n-7) -8*a(n-8) -2*a(n-9) +a(n-11)

EXAMPLE

Some solutions for n=4

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

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

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

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

CROSSREFS

Cf. A282862.

Sequence in context: A033474 A001896 A262630 * A296573 A180147 A044049

Adjacent sequences:  A282854 A282855 A282856 * A282858 A282859 A282860

KEYWORD

nonn

AUTHOR

R. H. Hardin, Feb 23 2017

STATUS

approved

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Last modified June 25 10:29 EDT 2019. Contains 324351 sequences. (Running on oeis4.)