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A275177 Number of n X n 0..2 arrays with no element equal to any value at offset (-2,-1), (-1,0) or (-1,1) and new values introduced in order 0..2. 0
1, 4, 25, 141, 1465, 23313, 561044, 20397794, 1120217646, 93298660085, 11806084302586, 2272026396983803, 664988521276834246 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

COMMENTS

Diagonal of A275183.

LINKS

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

EXAMPLE

Some solutions for n=4

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

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

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

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

CROSSREFS

Cf. A275183.

Sequence in context: A207410 A278275 A301836 * A079291 A173612 A072221

Adjacent sequences:  A275174 A275175 A275176 * A275178 A275179 A275180

KEYWORD

nonn

AUTHOR

R. H. Hardin, Jul 19 2016

STATUS

approved

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Last modified September 25 23:23 EDT 2020. Contains 337346 sequences. (Running on oeis4.)