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A205615 Number of 8X(n+1) 0..3 arrays with every 2X2 subblock having the same number of equal edges as its horizontal neighbors and a different number from its vertical neighbors, and new values 0..3 introduced in row major order 0
9140400, 953231848, 74880118862, 9140244711946, 833667153942097, 109899225787392773 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Row 7 of A205609

LINKS

Table of n, a(n) for n=1..6.

EXAMPLE

Some solutions for n=4

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

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

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

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

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

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

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

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

CROSSREFS

Sequence in context: A172620 A172711 A187675 * A251399 A206599 A245746

Adjacent sequences:  A205612 A205613 A205614 * A205616 A205617 A205618

KEYWORD

nonn

AUTHOR

R. H. Hardin Jan 29 2012

STATUS

approved

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Last modified July 6 15:30 EDT 2022. Contains 355110 sequences. (Running on oeis4.)