A222876 Number of nX6 0..3 arrays with no more than floor(nX6/2) elements equal to at least one horizontal or antidiagonal neighbor, with new values introduced in row major 0..3 order

131, 399849, 1340197778, 4643150795564, 16364046520925461, 58365501277437736651, 209946033151635587197031, 760026285340633515213165141, 2765078298066978400951570461522

Offset

1,1

Comments

Column 6 of A222878

Links

R. H. Hardin, Table of n, a(n) for n = 1..27

Example

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

Crossrefs

Sequence in context: A287071 A224843 A033530 * A267720 A263299 A330202

Adjacent sequences: A222873 A222874 A222875 * A222877 A222878 A222879

Keyword

nonn

Author

R. H. Hardin Mar 08 2013

Status

approved