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A204963 Number of (n+2)X(n+2) 0..1 arrays with every 3X3 subblock having three equal elements in a row horizontally, vertically, diagonally or antidiagonally at least two different ways, and new values 0..1 introduced in row major order 0
166, 10416, 1858301, 916967622, 1294422106052, 5180662454351231, 58780083916064047171 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Diagonal of A204971

LINKS

Table of n, a(n) for n=1..7.

EXAMPLE

Some solutions for n=3

..0..0..0..0..1....0..0..0..0..0....0..0..0..0..1....0..0..1..0..0

..1..1..1..1..0....1..1..0..1..0....1..0..0..0..0....1..0..1..1..1

..0..1..1..1..1....1..1..1..1..1....0..1..0..1..1....0..0..1..1..1

..0..0..1..1..1....1..1..1..1..0....1..1..1..1..1....1..0..1..0..0

..1..1..1..0..0....0..1..0..0..1....1..1..0..0..0....1..0..0..0..0

CROSSREFS

Sequence in context: A241969 A193984 A144380 * A011815 A188413 A144929

Adjacent sequences:  A204960 A204961 A204962 * A204964 A204965 A204966

KEYWORD

nonn

AUTHOR

R. H. Hardin Jan 21 2012

STATUS

approved

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Last modified October 7 14:13 EDT 2022. Contains 357271 sequences. (Running on oeis4.)