A265419 - OEIS

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A265419

Number of nX2 arrays containing 2 copies of 0..n-1 with no equal horizontal, vertical, diagonal or antidiagonal neighbors and new values introduced sequentially from 0.

0, 0, 0, 4, 48, 584, 8096, 127296, 2241856, 43770144, 939182976, 21981580224, 557527020544, 15236894019072, 446459870047232, 13964134704426752, 464407462322500608

(list; graph; refs; listen; history; text; internal format)

OFFSET

1,4

COMMENTS

Column 2 of A265421.

LINKS

Table of n, a(n) for n=1..17.

EXAMPLE

Some solutions for n=6

..0..1....0..1....0..1....0..1....0..1....0..1....0..1....0..1....0..1....0..1

..2..3....2..3....2..3....2..3....2..3....2..3....2..3....2..3....2..3....2..3

..0..1....1..4....0..4....0..4....4..0....0..4....4..5....1..0....1..4....4..0