A253656 Number of (n+1)X(2+1) 0..2 arrays with every 2X2 subblock diagonal maximum minus antidiagonal maximum unequal to its neighbors horizontally, vertically and nw-se diagonally

518, 3318, 25062, 181308, 1284808, 9172142, 65613880, 467877898, 3342085566, 23863144636, 170361773052, 1216457665598, 8685298245814, 62011878783818, 442766165059484, 3161297854578070, 22571505980125104, 161159074186279688

Offset

1,1

Comments

Column 2 of A253662

Links

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

R. H. Hardin, Empirical recurrence of order 76

Formula

Empirical recurrence of order 76 (see link above)

Example

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

Crossrefs

Sequence in context: A043380 A345578 A345835 * A233922 A236659 A236642

Adjacent sequences: A253653 A253654 A253655 * A253657 A253658 A253659

Keyword

nonn

Author

R. H. Hardin, Jan 07 2015

Status

approved