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A253612 Number of (n+2)X(2+2) 0..2 arrays with every consecutive three elements in every row and diagonal having one or two distinct values, and in every column and antidiagonal having two or three distinct values, and new values 0 upwards introduced in row major order 1
6916, 131378, 2501365, 48041910, 920906077, 17665509894, 338854514523, 6500005331011, 124684145636827, 2391719505327311, 45878483658735443, 880051229318868232, 16881337031496800473, 323821540743313385720 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 2 of A253615

LINKS

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

EXAMPLE

Some solutions for n=2

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

..1..0..0..1....2..2..1..2....2..2..2..1....2..2..1..2....1..2..1..2

..2..1..2..1....1..0..0..1....0..2..2..2....2..0..2..0....2..0..2..2

..2..2..2..2....0..0..0..2....1..0..0..0....0..0..0..2....0..1..0..0

CROSSREFS

Sequence in context: A272913 A230468 A186059 * A004243 A004244 A253736

Adjacent sequences:  A253609 A253610 A253611 * A253613 A253614 A253615

KEYWORD

nonn

AUTHOR

R. H. Hardin, Jan 05 2015

STATUS

approved

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Last modified November 29 06:00 EST 2021. Contains 349416 sequences. (Running on oeis4.)