A203187 Number of nX4 0..4 arrays with every nonzero element less than or equal to some horizontal or vertical neighbor

95, 53233, 19617781, 6474088455, 2202928769005, 754868206701309, 257892549401944763, 88078489175441149541, 30090514056455942145831, 10279936119776186239585141, 3511875047988498805215621351

Offset

1,1

Comments

Column 4 of A203191

Links

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

Example

Some solutions for n=4
..1..0..0..3....4..0..0..0....4..0..3..2....4..3..1..0....2..3..3..4
..2..0..2..3....4..4..0..0....4..4..4..3....4..2..2..3....2..4..4..4
..2..1..0..3....4..4..1..4....0..3..4..2....2..0..1..3....2..1..3..3
..1..4..4..3....4..2..2..4....4..4..1..1....0..0..3..3....3..3..4..4

Crossrefs

Sequence in context: A017758 A203342 A255936 * A103281 A266173 A057400

Adjacent sequences: A203184 A203185 A203186 * A203188 A203189 A203190

Keyword

nonn

Author

R. H. Hardin Dec 30 2011

Status

approved