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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 2
518, 3318, 25062, 181308, 1284808, 9172142, 65613880, 467877898, 3342085566, 23863144636, 170361773052, 1216457665598, 8685298245814, 62011878783818, 442766165059484, 3161297854578070, 22571505980125104, 161159074186279688 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,1
COMMENTS
Column 2 of A253662
LINKS
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
KEYWORD
nonn
AUTHOR
R. H. Hardin, Jan 07 2015
STATUS
approved

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Last modified April 21 23:01 EDT 2024. Contains 371886 sequences. (Running on oeis4.)