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A202639 Number of (n+2) X (n+2) binary arrays avoiding patterns 000 and 111 in rows, columns and nw-to-se diagonals. 0
66, 530, 7432, 171362, 6324344, 386981422, 38841628112, 6372413856774, 1725107798449008, 768319633522920162 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,1
COMMENTS
Diagonal of A202647.
LINKS
EXAMPLE
Some solutions for n=3
..1..0..1..0..0....1..1..0..1..0....1..0..0..1..0....0..0..1..1..0
..0..0..1..0..1....0..0..1..1..0....0..0..1..0..1....0..1..0..0..1
..0..1..0..1..1....0..1..0..0..1....0..1..0..1..1....1..1..0..1..1
..1..0..1..1..0....1..0..0..1..0....1..0..0..1..0....1..0..1..0..0
..0..0..1..0..1....0..1..1..0..0....0..1..1..0..0....0..1..0..0..1
CROSSREFS
Cf. A202647.
Sequence in context: A063249 A106212 A155022 * A175260 A233065 A129218
KEYWORD
nonn
AUTHOR
R. H. Hardin, Dec 22 2011
STATUS
approved

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Last modified June 14 10:08 EDT 2024. Contains 373395 sequences. (Running on oeis4.)