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A267333 Number of 4Xn arrays containing n copies of 0..4-1 with every element equal to or 1 greater than any southwest or northwest neighbors modulo 4 and the upper left element equal to 0. 1
6, 0, 0, 1, 22, 396, 2516, 10533, 33704, 92526, 369726, 2640466, 20643782, 138985920, 774999596, 3688265633, 16042197634, 71499663298, 364035498690, 2117882102632, 12817951753070, 74510126235424, 404088344721210, 2063669373837938 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Row 4 of A267328.

LINKS

R. H. Hardin, Table of n, a(n) for n = 1..32

EXAMPLE

Some solutions for n=6

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

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

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

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

CROSSREFS

Cf. A267328.

Sequence in context: A171916 A325740 A222118 * A337885 A333204 A186978

Adjacent sequences:  A267330 A267331 A267332 * A267334 A267335 A267336

KEYWORD

nonn

AUTHOR

R. H. Hardin, Jan 13 2016

STATUS

approved

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Last modified January 23 10:03 EST 2022. Contains 350510 sequences. (Running on oeis4.)