A266311 Number of 4Xn arrays containing n copies of 0..4-1 with no element 1 greater than its west neighbor modulo 4 and the upper left element equal to 0.

6, 171, 8190, 442285, 25839438, 1605405629, 103948820622, 6930557596953, 472599444039774, 32808183003171211, 2310785736121024350, 164716310371150628603, 11860112155495496736974, 861339905567424795731145

Offset

1,1

Comments

Row 4 of A266309.

Links

R. H. Hardin, Table of n, a(n) for n = 1..20

Example

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

Crossrefs

Cf. A266309.

Sequence in context: A264358 A264796 A266852 * A323820 A317795 A166762

Adjacent sequences: A266308 A266309 A266310 * A266312 A266313 A266314

Keyword

nonn

Author

R. H. Hardin, Dec 26 2015

Status

approved