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A267344 Number of 4Xn arrays containing n copies of 0..4-1 with every element equal to or 1 greater than any north, west or southwest neighbors modulo 4 and the upper left element equal to 0. 1
1, 1, 2, 12, 45, 135, 388, 1220, 5401, 27146, 125333, 515897, 2010472, 8064508, 34936670, 159444254, 725890833, 3205348045, 13816812300, 59601118346, 262631332138, 1183293213009, 5373170070242, 24253891624959, 108483481246313 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,3

COMMENTS

Row 4 of A267338.

LINKS

R. H. Hardin, Table of n, a(n) for n = 1..37

EXAMPLE

Some solutions for n=5

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

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

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

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

CROSSREFS

Cf. A267338.

Sequence in context: A028570 A009074 A356868 * A275132 A276294 A066258

Adjacent sequences: A267341 A267342 A267343 * A267345 A267346 A267347

KEYWORD

nonn

AUTHOR

R. H. Hardin, Jan 13 2016

STATUS

approved

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Last modified February 2 11:35 EST 2023. Contains 360011 sequences. (Running on oeis4.)