A266316 - OEIS

A266316

Number of n X 2 arrays containing 2 copies of 0..n-1 with no element 1 greater than its west or north neighbor modulo n and the upper left element equal to 0.

1, 0, 2, 35, 1007, 54819, 4318217, 458508379, 62976460150, 10860600443527, 2297243685069637, 584799993257765106

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OFFSET

1,3

COMMENTS

Column 2 of A266318.

LINKS

Table of n, a(n) for n=1..12.

EXAMPLE

Some solutions for n=4:

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

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

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

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

CROSSREFS

Cf. A266318.

Sequence in context: A277294 A191807 A245052 * A110697 A322514 A132100

Adjacent sequences: A266313 A266314 A266315 * A266317 A266318 A266319

KEYWORD

nonn,more

AUTHOR

R. H. Hardin, Dec 27 2015

STATUS

approved