A207461 - OEIS

A207461

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

2, 16, 98, 1307, 21517, 491948, 16675001, 760840082, 48694010408, 4485988205726, 562936265068141, 102307352557957161, 26014225086453944774, 9391676528481972080755, 4844995109176631213739332

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OFFSET

1,1

COMMENTS

Diagonal of A207467

LINKS

R. H. Hardin, Table of n, a(n) for n = 1..18

EXAMPLE

Some solutions for n=4

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

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

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

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

CROSSREFS

Sequence in context: A207387 A207934 A207780 * A207515 A207913 A208694

Adjacent sequences: A207458 A207459 A207460 * A207462 A207463 A207464

KEYWORD

nonn

AUTHOR

R. H. Hardin Feb 18 2012

STATUS

approved