A252878 Number of (n+2)X(2+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

3847, 25227, 175360, 1284278, 9590968, 71744739, 538250710, 4042792083, 30378440984, 228336299434, 1716547733894, 12905265671485, 97027793141860, 729515470475319, 5485019076491089, 41240570566543200, 310079418285221777

Offset

1,1

Comments

Column 2 of A252882

Links

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

Example

Some solutions for n=3
..0..0..1..2....0..0..1..1....0..0..1..2....0..1..2..2....0..0..1..1
..0..1..1..0....1..0..2..1....2..1..0..2....2..0..1..2....0..1..0..0
..2..1..1..0....0..2..1..0....0..0..1..2....2..1..2..2....2..1..0..1
..2..1..1..2....1..0..2..1....2..1..0..2....2..0..1..2....0..2..1..1
..0..0..1..0....1..0..1..0....0..0..1..1....2..1..2..0....2..2..1..2

Crossrefs

Sequence in context: A185773 A031560 A180505 * A234918 A015069 A015070

Adjacent sequences: A252875 A252876 A252877 * A252879 A252880 A252881

Keyword

nonn

Author

R. H. Hardin, Dec 24 2014

Status

approved