A207301 - OEIS

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A207301

Number of n X n 0..1 arrays avoiding 0 0 0 and 1 0 1 horizontally and 0 0 1 and 1 1 0 vertically

0

2, 16, 98, 643, 3773, 23091, 154228, 1050811, 7236644, 51776044, 383107149, 2907310903, 22583670553, 180085426836, 1470632881207

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

OFFSET

1,1

COMMENTS

Diagonal of A207305

LINKS

Table of n, a(n) for n=1..15.

EXAMPLE

Some solutions for n=4

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

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

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

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

CROSSREFS

Sequence in context: A335349 A005058 A082639 * A207105 A207387 A207934

Adjacent sequences: A207298 A207299 A207300 * A207302 A207303 A207304

KEYWORD

nonn

AUTHOR

R. H. Hardin Feb 16 2012

STATUS

approved