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A207117 Number of n X n 0..1 arrays avoiding 0 0 1 and 0 1 0 horizontally and 0 0 1 and 0 1 1 vertically 1
2, 16, 102, 1024, 12288, 175561, 2330037, 40119556, 667127008, 12622297801, 236060280854, 5051251755001, 104507364758952, 2416776784204176, 54925343492859621, 1369884877162739344, 33478733130375924736 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Diagonal of A207123

LINKS

R. H. Hardin, Table of n, a(n) for n = 1..19

EXAMPLE

Some solutions for n=4

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

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

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

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

CROSSREFS

Sequence in context: A207236 A207955 A207494 * A208415 A207945 A207853

Adjacent sequences:  A207114 A207115 A207116 * A207118 A207119 A207120

KEYWORD

nonn

AUTHOR

R. H. Hardin Feb 15 2012

STATUS

approved

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Last modified September 27 20:41 EDT 2021. Contains 347694 sequences. (Running on oeis4.)