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A267074 Number of 4Xn arrays containing n copies of 0..4-1 with no element 1 greater than its west or southwest neighbor modulo 4 and the upper left element equal to 0. 1
6, 44, 1129, 30637, 775567, 21970109, 676906680, 21300928198, 681356875633, 22263527673539, 739749532618244, 24869575479353155, 844359305686979781, 28920001414149308262, 998012306992020016156, 34663335569939361225767 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Row 4 of A267072.

LINKS

R. H. Hardin, Table of n, a(n) for n = 1..20

EXAMPLE

Some solutions for n=4

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

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

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

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

CROSSREFS

Cf. A267072.

Sequence in context: A284218 A295978 A194928 * A271963 A065783 A158460

Adjacent sequences:  A267071 A267072 A267073 * A267075 A267076 A267077

KEYWORD

nonn

AUTHOR

R. H. Hardin, Jan 10 2016

STATUS

approved

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Last modified October 30 06:31 EDT 2020. Contains 338077 sequences. (Running on oeis4.)