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A281132 Number of nXn 0..2 arrays with no element equal to more than one of its king-move neighbors, with the exception of exactly one element, and with new values introduced in order 0 sequentially upwards. 0
0, 0, 297, 2368, 9484, 29408, 85874, 239368, 635490, 1614888, 3982412, 9598424, 22720722 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,3

COMMENTS

Diagonal of A281139.

LINKS

Table of n, a(n) for n=1..13.

EXAMPLE

Some solutions for n=4

..0..0..1..0. .0..1..0..1. .0..0..1..0. .0..1..1..2. .0..0..1..0

..1..2..2..0. .2..1..2..1. .1..2..1..2. .2..2..0..2. .1..1..2..0

..1..0..1..0. .2..0..2..0. .0..2..0..2. .1..0..1..1. .2..0..2..1

..2..0..2..2. .0..1..2..1. .1..1..1..0. .1..0..2..2. .1..1..0..1

CROSSREFS

Cf. A281139.

Sequence in context: A253035 A253029 A251289 * A200855 A200582 A200581

Adjacent sequences:  A281129 A281130 A281131 * A281133 A281134 A281135

KEYWORD

nonn

AUTHOR

R. H. Hardin, Jan 15 2017

STATUS

approved

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Last modified November 20 13:14 EST 2019. Contains 329336 sequences. (Running on oeis4.)