A265658 Number of 4Xn arrays containing n copies of 0..4-1 with no equal diagonal or antidiagonal neighbors and new values introduced sequentially from 0.

1, 43, 1129, 39913, 1465545, 56069313, 2233380101, 90910542367, 3781693498707, 159766749887717, 6840968180271233, 296179445221357883, 12943965113650046445, 570298650928292714341, 25303264564126389894725

Offset

1,2

Comments

Row 4 of A265656.

Links

R. H. Hardin, Table of n, a(n) for n = 1..18

Example

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

Crossrefs

Cf. A265656.

Sequence in context: A010995 A253915 A288031 * A214100 A229432 A122575

Adjacent sequences: A265655 A265656 A265657 * A265659 A265660 A265661

Keyword

nonn

Author

R. H. Hardin, Dec 12 2015

Status

approved