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A251242 Number of (n+1)X(n+1) 0..2 arrays with no 2X2 subblock having the sum of its diagonal elements less than the minimum of its antidiagonal elements 1
75, 14265, 20904689, 236035946835, 20534495636679387, 13764744150100667222985, 71093648993125363900542904561, 2829255370682961509218005180234886323 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Diagonal of A251249

LINKS

R. H. Hardin, Table of n, a(n) for n = 1..11

EXAMPLE

Some solutions for n=2

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

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

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

CROSSREFS

Sequence in context: A114910 A294983 A093275 * A259464 A116527 A263064

Adjacent sequences:  A251239 A251240 A251241 * A251243 A251244 A251245

KEYWORD

nonn

AUTHOR

R. H. Hardin, Dec 01 2014

STATUS

approved

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Last modified January 28 03:49 EST 2020. Contains 331317 sequences. (Running on oeis4.)