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A265665 Number of 4Xn arrays containing n copies of 0..4-1 with no element plus any horizontal or vertical neighbor equal to 4-1. 1
8, 112, 1608, 34056, 828152, 22810912, 669333208, 20546265528, 649861726120, 21020496729712, 691708911692440, 23078550392326408, 778812907863938840, 26534665934493312256, 911468660655321411048, 31531001251952600414360 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Row 4 of A265663.

LINKS

R. H. Hardin, Table of n, a(n) for n = 1..22

EXAMPLE

Some solutions for n=4

..1..1..0..0....3..1..1..3....2..0..1..0....3..1..0..2....3..1..1..3

..1..0..1..0....3..1..3..1....0..1..0..2....1..1..0..0....2..3..1..1

..3..2..3..2....2..0..2..0....1..3..2..3....1..3..2..0....3..2..0..0

..2..3..2..3....2..2..0..0....3..1..3..2....3..2..3..2....2..0..2..0

CROSSREFS

Cf. A265663.

Sequence in context: A139741 A067900 A067414 * A302104 A219184 A034689

Adjacent sequences:  A265662 A265663 A265664 * A265666 A265667 A265668

KEYWORD

nonn

AUTHOR

R. H. Hardin, Dec 12 2015

STATUS

approved

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Last modified April 13 21:24 EDT 2021. Contains 342941 sequences. (Running on oeis4.)