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A252884 Number of (2+2)X(n+2) 0..2 arrays with every consecutive three elements in every row having 2 or 3 distinct values, in every column 1 or 2 distinct values, in every diagonal 2 distinct values, and in every antidiagonal 2 distinct values, and new values 0 upwards introduced in row major order 1
3102, 25227, 206314, 1723377, 14424475, 120914908, 1013935410, 8505529697, 71356949001, 598708221110, 5023496674281, 42151375927194, 353688236912557, 2967792166328957, 24902779030429194, 208960087817293157 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Row 2 of A252882

LINKS

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

EXAMPLE

Some solutions for n=2

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

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

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

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

CROSSREFS

Sequence in context: A206132 A187305 A236121 * A103523 A234265 A090056

Adjacent sequences:  A252881 A252882 A252883 * A252885 A252886 A252887

KEYWORD

nonn

AUTHOR

R. H. Hardin, Dec 24 2014

STATUS

approved

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Last modified May 19 20:39 EDT 2019. Contains 323407 sequences. (Running on oeis4.)