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A250833 Number of (n+1)X(n+1) 0..2 arrays with no 2X2 subblock having a diagonal absolute difference less than its antidiagonal absolute difference 0
55, 4131, 1301955, 1751284191, 10042099602523, 245660147951906863, 25646762400407469919163, 11428578484306710530465058551 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Diagonal of A250841

LINKS

Table of n, a(n) for n=1..8.

EXAMPLE

Some solutions for n=2

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

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

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

CROSSREFS

Sequence in context: A081993 A060077 A035323 * A206097 A103918 A013537

Adjacent sequences:  A250830 A250831 A250832 * A250834 A250835 A250836

KEYWORD

nonn

AUTHOR

R. H. Hardin, Nov 27 2014

STATUS

approved

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Last modified November 26 07:49 EST 2020. Contains 338632 sequences. (Running on oeis4.)