A199245 - OEIS

A199245

Number of nX7 0..2 arrays with values 0..2 introduced in row major order, the number of instances of each value within one of each other, and every element equal to zero or two horizontal or vertical neighbors

19, 288, 2080, 134821, 3190670, 27337776, 2013526831, 52332203186

(list; graph; refs; listen; history; text; internal format)

OFFSET

1,1

COMMENTS

Column 7 of A199246

LINKS

Table of n, a(n) for n=1..8.

EXAMPLE

Some solutions for n=4

..0..1..0..1..0..0..2....0..1..0..2..0..2..1....0..1..0..2..0..1..2

..2..0..1..2..0..0..1....1..0..1..0..2..1..2....1..0..2..0..1..2..0

..0..2..0..1..1..2..2....0..2..0..2..1..2..1....0..1..0..1..2..0..2

..1..0..2..1..1..2..2....2..0..1..0..2..1..2....1..2..1..2..1..2..0

CROSSREFS

Sequence in context: A328916 A081045 A155017 * A152591 A051562 A330846

Adjacent sequences: A199242 A199243 A199244 * A199246 A199247 A199248

KEYWORD

nonn

AUTHOR

R. H. Hardin Nov 04 2011

STATUS

approved