A204951 - OEIS

A204951

Number of (n+2)X7 0..2 arrays with every 3X3 subblock having three equal elements in a row horizontally, vertically, diagonally or antidiagonally exactly two different ways, and new values 0..2 introduced in row major order

1834500, 48128792, 1407027760, 33301704234, 1021853269087, 31154215435107, 852919335897276, 25798049630239010

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

OFFSET

1,1

COMMENTS

Column 5 of A204954

LINKS

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

EXAMPLE

Some solutions for n=3

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

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

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

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

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

CROSSREFS

Sequence in context: A205412 A249211 A244074 * A205639 A269117 A202469

Adjacent sequences: A204948 A204949 A204950 * A204952 A204953 A204954

KEYWORD

nonn

AUTHOR

R. H. Hardin Jan 20 2012

STATUS

approved