A203926 Number of (n+1)X(n+1) 0..5 arrays with every 2X2 subblock having equal diagonal elements or equal antidiagonal elements

396, 106596, 140120856, 1012872412476, 41849462653189056, 10145256726122341001496

Offset

1,1

Comments

Diagonal of A203934

Links

Table of n, a(n) for n=1..6.

Example

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

Crossrefs

Sequence in context: A092720 A230732 A034621 * A270842 A074483 A023326

Adjacent sequences: A203923 A203924 A203925 * A203927 A203928 A203929

Keyword

nonn

Author

R. H. Hardin Jan 08 2012

Status

approved