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A267568 Number of 4Xn arrays containing n copies of 0..4-1 with every element equal to or 1 greater than any west or southwest neighbors modulo 4 and the upper left element equal to 0. 1
6, 2, 3, 15, 170, 1614, 11048, 60954, 299110, 1494098, 8772195, 61209175, 450621524, 3191383332, 21167733740, 133174852936, 820343904175, 5126587427874, 33208210014133, 222276340846479, 1507709621631348, 10169384286795946 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Row 4 of A267562.

LINKS

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

EXAMPLE

Some solutions for n=4

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

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

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

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

CROSSREFS

Cf. A267562.

Sequence in context: A256632 A201280 A248274 * A182011 A086048 A239578

Adjacent sequences:  A267565 A267566 A267567 * A267569 A267570 A267571

KEYWORD

nonn

AUTHOR

R. H. Hardin, Jan 17 2016

STATUS

approved

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Last modified August 16 05:16 EDT 2022. Contains 356162 sequences. (Running on oeis4.)