A253657 Number of (n+1)X(3+1) 0..2 arrays with every 2X2 subblock diagonal maximum minus antidiagonal maximum unequal to its neighbors horizontally, vertically and nw-se diagonally

3550, 25062, 241548, 2113406, 17719343, 152352910, 1302707432, 11094507660, 94827318012, 808751503976, 6903022252385, 58900473067302, 502630468746850, 4288654203577526, 36596735470949736, 312258842250198756

Offset

1,1

Comments

Column 3 of A253662

Links

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

Example

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

Crossrefs

Sequence in context: A220985 A252989 A253309 * A251040 A253727 A218815

Adjacent sequences: A253654 A253655 A253656 * A253658 A253659 A253660

Keyword

nonn

Author

R. H. Hardin, Jan 07 2015

Status

approved