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A253525 Number of (n+1)X(n+1) 0..2 arrays with every 2X2 subblock antidiagonal maximum minus diagonal minimum nondecreasing horizontally and diagonal maximum minus antidiagonal minimum nondecreasing vertically 0
81, 2722, 22418, 182493, 745281, 4292539, 14461240, 74067255, 239552591, 1153148632, 3757984096, 17291330720, 57734458801 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Diagonal of A253533

LINKS

Table of n, a(n) for n=1..13.

EXAMPLE

Some solutions for n=4

..1..0..0..1..0....1..0..1..0..2....2..2..1..2..2....0..0..1..2..2

..2..1..1..1..0....2..1..1..0..0....1..1..0..1..0....1..0..0..1..0

..2..2..2..2..0....1..1..1..2..1....2..2..1..2..2....0..0..0..1..0

..1..1..1..1..0....0..1..0..2..1....0..1..0..0..0....0..1..0..1..0

..0..1..2..2..2....2..2..0..2..0....0..2..1..1..2....1..2..1..2..2

CROSSREFS

Sequence in context: A297084 A018223 A206660 * A253741 A253516 A038398

Adjacent sequences:  A253522 A253523 A253524 * A253526 A253527 A253528

KEYWORD

nonn

AUTHOR

R. H. Hardin, Jan 03 2015

STATUS

approved

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Last modified October 16 06:26 EDT 2019. Contains 328050 sequences. (Running on oeis4.)