A222888 Number of nX5 0..2 arrays with exactly floor(nX5/2) elements equal to at least one horizontal or vertical neighbor, with new values introduced in row major 0..2 order

16, 1222, 138026, 24893100, 2737507523, 518031070610, 57938967907855, 11279149298276340, 1275220409032117490, 252490047545846068708, 28751346406380329048124, 5756690997936847064344575

Offset

1,1

Comments

Column 5 of A222889

Links

R. H. Hardin, Table of n, a(n) for n = 1..18

Example

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

Crossrefs

Sequence in context: A160131 A206691 A064346 * A113104 A227602 A186856

Adjacent sequences: A222885 A222886 A222887 * A222889 A222890 A222891

Keyword

nonn

Author

R. H. Hardin Mar 08 2013

Status

approved