A222874 Number of nX4 0..3 arrays with no more than floor(nX4/2) elements equal to at least one horizontal or antidiagonal neighbor, with new values introduced in row major 0..3 order

11, 1814, 409775, 95867967, 22794825314, 5472896849943, 1322676376672081, 321195816580955511, 78284744747263499257, 19135706630178881122106, 4688528991184907785652449, 1151011442556048521433434944

Offset

1,1

Comments

Column 4 of A222878

Links

R. H. Hardin, Table of n, a(n) for n = 1..97

Example

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

Crossrefs

Sequence in context: A287035 A297004 A308155 * A028453 A024151 A114354

Adjacent sequences: A222871 A222872 A222873 * A222875 A222876 A222877

Keyword

nonn

Author

R. H. Hardin Mar 08 2013

Status

approved