A267333 - OEIS

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.

6, 0, 0, 1, 22, 396, 2516, 10533, 33704, 92526, 369726, 2640466, 20643782, 138985920, 774999596, 3688265633, 16042197634, 71499663298, 364035498690, 2117882102632, 12817951753070, 74510126235424, 404088344721210, 2063669373837938

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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