A253306 Number of (n+1)X(n+1) 0..2 arrays with every 2X2 subblock diagonal maximum minus antidiagonal maximum unequal to its neighbors horizontally, vertically, diagonally and antidiagonally

81, 1752, 64560, 516928, 16534784, 45899840, 2762956252, 2818822376, 415652059980, 163088180880, 58352627572340, 9240725160960, 7903320200155840, 527212884271456, 1048584505666800960

Offset

1,1

Comments

Diagonal of A253314

Links

Table of n, a(n) for n=1..15.

Example

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

Crossrefs

Sequence in context: A268974 A206677 A237091 * A237801 A328683 A236057

Adjacent sequences: A253303 A253304 A253305 * A253307 A253308 A253309

Keyword

nonn

Author

R. H. Hardin, Dec 30 2014

Status

approved