A238933 Number of (4+1)X(n+1) 0..3 arrays with no element greater than all horizontal neighbors or equal to all vertical neighbors.

540, 176224, 22636472, 2531484558, 330899764092, 45110351036260, 6073850637262806, 810496773508386224, 108127360707006003716, 14442654537530496784878, 1929809100292543309059168

Offset

1,1

Comments

Row 4 of A238929

Links

R. H. Hardin, Table of n, a(n) for n = 1..103

Example

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

Crossrefs

Sequence in context: A146196 A054562 A056934 * A003746 A203408 A259165

Adjacent sequences: A238930 A238931 A238932 * A238934 A238935 A238936

Keyword

nonn

Author

R. H. Hardin, Mar 07 2014

Status

approved