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A250974 Number of (n+1)X(n+1) 0..2 arrays with no 2X2 subblock having the sum of its diagonal elements less than the absolute difference of its antidiagonal elements 0
71, 12077, 15156945, 139471732486, 9416933752243198, 4665050923272559405591, 16956293118548007574241097692, 452201064244928394467769407865217365, 88482711640559551663354157554544852988982071 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Diagonal of A250982

LINKS

Table of n, a(n) for n=1..9.

EXAMPLE

Some solutions for n=2

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

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

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

CROSSREFS

Sequence in context: A115447 A200960 A260034 * A209952 A251382 A208679

Adjacent sequences:  A250971 A250972 A250973 * A250975 A250976 A250977

KEYWORD

nonn

AUTHOR

R. H. Hardin, Nov 29 2014

STATUS

approved

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Last modified January 16 13:35 EST 2022. Contains 350376 sequences. (Running on oeis4.)