A253727 Number of (n+1)X(3+1) 0..2 arrays with every 2X2 subblock diagonal maximum minus antidiagonal maximum unequal to its neighbors horizontally and vertically

3550, 83884, 2240030, 57696638, 1480378584, 37974926408, 973419692344, 24954361428316, 639722018395542, 16399618381462986, 420413253006099542, 10777534399917205716, 276288152540512284466, 7082802871534880299076

Offset

1,1

Comments

Column 3 of A253731

Links

R. H. Hardin, Table of n, a(n) for n = 1..210

Example

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

Crossrefs

Sequence in context: A253309 A253657 A251040 * A218815 A248855 A151810

Adjacent sequences: A253724 A253725 A253726 * A253728 A253729 A253730

Keyword

nonn

Author

R. H. Hardin, Jan 10 2015

Status

approved