A203879 Number of (n+1)X(n+1) 0..6 arrays with every 2X2 subblock having equal diagonal elements or equal antidiagonal elements

637, 254359, 543848893, 7265109130279, 632382967906147549

Offset

1,1

Comments

Diagonal of A203887

Links

Table of n, a(n) for n=1..5.

Example

Some solutions for n=4
..3..3..0..5..1....3..5..1..6..6....5..5..1..3..3....2..5..1..0..1
..0..3..3..0..5....2..3..5..1..6....6..5..5..1..3....6..2..5..1..6
..1..0..3..3..0....1..2..3..5..1....4..6..5..5..1....1..6..2..5..1
..6..1..0..3..3....0..1..2..3..5....4..4..6..5..5....4..1..6..2..5
..1..2..1..0..3....6..0..1..2..3....4..1..4..6..5....0..4..1..6..2

Crossrefs

Sequence in context: A203887 A203880 A250465 * A317395 A212399 A264449

Adjacent sequences: A203876 A203877 A203878 * A203880 A203881 A203882

Keyword

nonn

Author

R. H. Hardin Jan 07 2012

Status

approved