A251435 Number of (n+1)X(1+1) 0..3 arrays with no 2X2 subblock having the minimum of its diagonal elements greater than the absolute difference of its antidiagonal elements

192, 2312, 27486, 327033, 3888017, 46227589, 549607078, 6534412622, 77688966462, 923660531016, 10981592676546, 130562451319000, 1552284257397407, 18455431860393891, 219420485113354861, 2608735989678877133

Offset

1,1

Comments

Column 1 of A251442

Links

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

Formula

Empirical: a(n) = 11*a(n-1) +20*a(n-2) -109*a(n-3) -48*a(n-4) +138*a(n-5) -46*a(n-6) -68*a(n-7) +48*a(n-8) -7*a(n-9) -9*a(n-10)

Example

Some solutions for n=3
..0..1....2..1....0..0....3..0....2..2....2..2....2..3....2..2....2..3....1..3
..0..0....3..2....1..0....3..3....3..0....3..0....0..2....0..3....1..2....0..2
..2..1....1..0....1..3....0..2....1..1....3..3....0..3....0..1....0..1....0..2
..2..0....0..0....3..0....3..2....2..3....2..1....0..2....3..3....3..2....3..2

Crossrefs

Sequence in context: A188786 A362510 A251442 * A183710 A183702 A351632

Adjacent sequences: A251432 A251433 A251434 * A251436 A251437 A251438

Keyword

nonn

Author

R. H. Hardin, Dec 02 2014

Status

approved