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A266855 Number of 4Xn arrays containing n copies of 0..4-1 with no element 1 greater than its north, west, northeast or southeast neighbor modulo 4 and the upper left element equal to 0. 1
2, 6, 44, 438, 4156, 49033, 588632, 8351513, 113609298, 1770032098, 26096782411, 426735882363, 6595598937191, 110427559297288, 1759795259815468, 29843750451187538, 485812231474336419, 8302508424244712407 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Row 4 of A266854.

LINKS

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

EXAMPLE

Some solutions for n=5

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

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

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

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

CROSSREFS

Cf. A266854.

Sequence in context: A120594 A038180 A058925 * A171690 A259763 A219337

Adjacent sequences:  A266852 A266853 A266854 * A266856 A266857 A266858

KEYWORD

nonn

AUTHOR

R. H. Hardin, Jan 04 2016

STATUS

approved

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Last modified November 16 19:17 EST 2019. Contains 329201 sequences. (Running on oeis4.)