A238283 Number of (n+1)X(3+1) 0..3 arrays with no element greater than all horizontal neighbors or less than all vertical neighbors

50, 1844, 42084, 737366, 12926271, 245920800, 4810332239, 92790334588, 1767175335274, 33631393265283, 642245437813719, 12282485000914102, 234784249649799771, 4485361687341554225, 85682498512887615932

Offset

1,1

Comments

Column 3 of A238287

Links

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

Example

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

Crossrefs

Sequence in context: A001241 A164986 A224121 * A240191 A231696 A285877

Adjacent sequences: A238280 A238281 A238282 * A238284 A238285 A238286

Keyword

nonn

Author

R. H. Hardin, Feb 22 2014

Status

approved