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A268120 Number of 4Xn arrays containing n copies of 0..4-1 with every element equal to or 1 greater than any north or west neighbors modulo 4 and the upper left element equal to 0. 1
1, 2, 5, 25, 182, 1256, 7396, 39891, 210384, 1168317, 7080023, 45942141, 304138329, 1984289501, 12627984625, 79001714951, 493690545161, 3127108593615, 20194195021000, 132397182653318, 873218912983165, 5749093679423621 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

COMMENTS

Row 4 of A268115.

LINKS

R. H. Hardin, Table of n, a(n) for n = 1..34

EXAMPLE

Some solutions for n=6

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

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

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

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

CROSSREFS

Cf. A268115.

Sequence in context: A268356 A074417 A296105 * A049650 A191506 A139007

Adjacent sequences:  A268117 A268118 A268119 * A268121 A268122 A268123

KEYWORD

nonn

AUTHOR

R. H. Hardin, Jan 26 2016

STATUS

approved

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Last modified April 22 11:46 EDT 2019. Contains 322330 sequences. (Running on oeis4.)