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

46244, 8320896, 1497752279, 269564757184, 48514315795424, 8731180080790272, 1571357864513534615, 282798467877162729472, 50895449111945982219476, 9159691311528261431878656, 1648476353703726217477223567

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: A168630 A361035 A190882 * A202897 A185518 A230237

Adjacent sequences: A251275 A251276 A251277 * A251279 A251280 A251281

Keyword

nonn

Author

R. H. Hardin, Dec 01 2014

Status

approved