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A267743 Number of 4Xn arrays containing n copies of 0..4-1 with every element equal to or 1 greater than any west or northeast neighbors modulo 4 and the upper left element equal to 0. 1
6, 5, 26, 123, 633, 3428, 18899, 106599, 618585, 3674665, 22190640, 135570897, 835884024, 5196879659, 32568136350, 205609418532, 1306436325774, 8346088687406, 53563228719519, 345155128538327, 2232566289999786 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Row 4 of A267742.

LINKS

R. H. Hardin, Table of n, a(n) for n = 1..31

EXAMPLE

Some solutions for n=4

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

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

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

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

CROSSREFS

Cf. A267742.

Sequence in context: A267284 A228969 A256961 * A298155 A219931 A296192

Adjacent sequences:  A267740 A267741 A267742 * A267744 A267745 A267746

KEYWORD

nonn

AUTHOR

R. H. Hardin, Jan 20 2016

STATUS

approved

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Last modified September 23 02:41 EDT 2021. Contains 347609 sequences. (Running on oeis4.)