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A251244 Number of (n+1)X(3+1) 0..2 arrays with no 2X2 subblock having the sum of its diagonal elements less than the minimum of its antidiagonal elements 1
5139, 327753, 20904689, 1333268433, 85032883789, 5423196612609, 345878548314469, 22059307525808241, 1406889917539387453, 89728076602595409057, 5722642281407762900517, 364976447934805630538193 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 3 of A251249

LINKS

R. H. Hardin, Table of n, a(n) for n = 1..210

FORMULA

Empirical: a(n) = 81*a(n-1) -1165*a(n-2) +4257*a(n-3) -544*a(n-4) -4428*a(n-5) +7512*a(n-6) -80352*a(n-7) -67376*a(n-8) +32256*a(n-9) +20160*a(n-10)

EXAMPLE

Some solutions for n=1

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

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

CROSSREFS

Sequence in context: A255779 A237206 A230575 * A188338 A213701 A224462

Adjacent sequences:  A251241 A251242 A251243 * A251245 A251246 A251247

KEYWORD

nonn

AUTHOR

R. H. Hardin, Dec 01 2014

STATUS

approved

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Last modified May 16 14:39 EDT 2021. Contains 343949 sequences. (Running on oeis4.)