A203655 1/25 the number of (n+1)X8 0..4 arrays with every 2X2 subblock having equal diagonal elements or equal antidiagonal elements

4782969, 3295578857, 2843024036697, 2669260624372937, 2592476403527692089, 2554890395768832271017, 2533535485859974387986201, 2519204090844384026262668425, 2507880611006135260374020018937

Offset

1,1

Comments

Column 7 of A203656

Links

R. H. Hardin, Table of n, a(n) for n = 1..22

Example

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

Crossrefs

Sequence in context: A017383 A017503 A017635 * A248587 A204053 A176772

Adjacent sequences: A203652 A203653 A203654 * A203656 A203657 A203658

Keyword

nonn

Author

R. H. Hardin Jan 04 2012

Status

approved