A252989 Number of (n+2)X(3+2) 0..2 arrays with every consecutive three elements in every row and column having exactly 2 distinct values, in every diagonal 1 or 2 distinct values, in every antidiagonal 2 or 3 distinct values, and new values 0 upwards introduced in row major order

3548, 24001, 176608, 1350439, 10388030, 80232248, 620852707, 4808767844, 37257749515, 288739455911, 2237986443070, 17347242804844, 134469582550424, 1042391444409217, 8080557887620007, 62640695434924075, 485595751974289946

Offset

1,1

Comments

Column 3 of A252993

Links

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

Example

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

Crossrefs

Sequence in context: A354542 A020412 A220985 * A253309 A253657 A251040

Adjacent sequences: A252986 A252987 A252988 * A252990 A252991 A252992

Keyword

nonn

Author

R. H. Hardin, Dec 25 2014

Status

approved