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A251278 Number of (n+1)X(3+1) 0..3 arrays with no 2X2 subblock having its maximum diagonal element less than its minimum antidiagonal element 1
46244, 8320896, 1497752279, 269564757184, 48514315795424, 8731180080790272, 1571357864513534615, 282798467877162729472, 50895449111945982219476, 9159691311528261431878656, 1648476353703726217477223567 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 3 of A251283

LINKS

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

FORMULA

Empirical: a(n) = 230*a(n-1) -9371*a(n-2) +68562*a(n-3) -428619*a(n-4) -3386398*a(n-5) +50923111*a(n-6) -44328410*a(n-7) -221985864*a(n-8) -608157648*a(n-9)

EXAMPLE

Some solutions for n=1

..3..3..0..1....0..2..3..2....2..3..2..3....0..3..2..1....3..2..3..2

..3..3..0..0....0..2..0..1....3..3..1..2....3..3..2..0....2..0..0..0

CROSSREFS

Sequence in context: A115939 A168630 A190882 * A202897 A185518 A230237

Adjacent sequences:  A251275 A251276 A251277 * A251279 A251280 A251281

KEYWORD

nonn

AUTHOR

R. H. Hardin, Dec 01 2014

STATUS

approved

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Last modified October 16 20:36 EDT 2021. Contains 348047 sequences. (Running on oeis4.)