A266601 Number of 4Xn arrays containing n copies of 0..4-1 with no element 1 greater than its north or northeast neighbor modulo 4 and the upper left element equal to 0.

2, 38, 964, 30637, 1073367, 39966856, 1551883779, 62152155338, 2549025811419, 106526379738263, 4520170915107051, 194230279053023377, 8434658244488956260, 369593817153717655945, 16321035858001412664324, 725605378261164051062577

Offset

1,1

Comments

Row 4 of A266599.

Links

R. H. Hardin, Table of n, a(n) for n = 1..26

Example

Some solutions for n=4
..0..1..1..3....0..1..0..3....0..3..1..0....0..0..2..3....0..1..0..2
..3..0..1..2....3..3..3..2....3..3..3..2....0..0..2..1....0..3..0..2
..2..0..0..1....2..2..1..1....1..1..2..2....3..2..1..3....3..3..2..2
..2..2..3..3....2..1..0..0....0..0..1..2....1..1..3..2....3..1..1..1

Crossrefs

Cf. A266599.

Sequence in context: A075796 A230903 A246000 * A266597 A291821 A187544

Adjacent sequences: A266598 A266599 A266600 * A266602 A266603 A266604

Keyword

nonn

Author

R. H. Hardin, Jan 01 2016

Status

approved