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A251129 Number of (n+1)X(n+1) 0..2 arrays with no 2X2 subblock having the sum of its diagonal elements greater than the maximum of its antidiagonal elements 0
40, 416, 1997, 8008, 25597, 79226, 223663, 620524, 1653313, 4340190, 11150995, 28282512, 70727013, 174943234, 428129015, 1038115892 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Diagonal of A251137

LINKS

Table of n, a(n) for n=1..16.

EXAMPLE

Some solutions for n=4

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

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

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

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

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

CROSSREFS

Sequence in context: A253132 A293969 A168192 * A007772 A228122 A247408

Adjacent sequences:  A251126 A251127 A251128 * A251130 A251131 A251132

KEYWORD

nonn

AUTHOR

R. H. Hardin, Nov 30 2014

STATUS

approved

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Last modified October 25 10:46 EDT 2021. Contains 348239 sequences. (Running on oeis4.)