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A275394 Number of n X n 0..2 arrays with no element equal to any value at offset (-2,-1), (-2,0) or (-1,1) and new values introduced in order 0..2. 0
1, 9, 84, 1011, 14884, 518049, 30551417, 3146508594, 552879942836, 167170218443304, 86562563964524453 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

COMMENTS

Diagonal of A275401.

LINKS

Table of n, a(n) for n=1..11.

EXAMPLE

Some solutions for n=4

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

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

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

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

CROSSREFS

Cf. A275401.

Sequence in context: A024118 A166902 A348316 * A236385 A335670 A196434

Adjacent sequences:  A275391 A275392 A275393 * A275395 A275396 A275397

KEYWORD

nonn

AUTHOR

R. H. Hardin, Jul 26 2016

STATUS

approved

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Last modified November 27 16:20 EST 2021. Contains 349394 sequences. (Running on oeis4.)