A202646 Number of (n+2)X9 binary arrays avoiding patterns 000 and 111 in rows, columns and nw-to-se diagonals

25526, 224940, 2443538, 27264078, 304200608, 3423531924, 38841628112, 440204384164, 4991946563700, 56832465909314, 646275853203400, 7346916109114702, 83673041654762546, 952266920996706060

Offset

1,1

Comments

Column 7 of A202647

Links

R. H. Hardin, Table of n, a(n) for n = 1..210

Example

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

Crossrefs

Sequence in context: A124997 A031837 A237865 * A210093 A184027 A023350

Adjacent sequences: A202643 A202644 A202645 * A202647 A202648 A202649

Keyword

nonn

Author

R. H. Hardin Dec 22 2011

Status

approved