A253039 Number of (n+2) X (3+2) 0..3 arrays with every consecutive three elements in every row, column, diagonal and antidiagonal having exactly two distinct values, and new values 0 upwards introduced in row major order.

928, 998, 1750, 3119, 6086, 12641, 25184, 54251, 111467, 239582, 500112, 1084951, 2264912, 4927102, 10326385, 22471670, 47248426, 102846945, 216359840, 471311716, 993403943, 2162719496, 4561950718, 9932410117, 20975309974

Offset

1,1

Comments

Column 3 of A253044.

Links

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

R. H. Hardin, Empirical recurrence of order 78

Formula

Empirical recurrence of order 78 (see link above).

Example

Some solutions for n=4
..0..0..1..0..1....0..1..1..2..2....0..1..0..1..0....0..0..1..1..2
..2..2..1..1..2....0..2..2..1..1....2..2..0..0..2....2..1..1..0..0
..2..0..2..0..2....1..1..2..1..2....2..1..2..1..2....2..0..0..1..0
..0..2..2..0..0....1..1..0..0..1....0..2..2..1..1....1..1..0..0..3
..0..2..0..2..0....2..0..2..0..2....0..1..1..2..1....1..0..1..1..3
..3..3..0..0..1....1..0..0..2..2....2..2..1..1..3....3..1..1..0..0

Crossrefs

Cf. A253044.

Sequence in context: A099688 A257485 A255106 * A237229 A219526 A249535

Adjacent sequences: A253036 A253037 A253038 * A253040 A253041 A253042

Keyword

nonn

Author

R. H. Hardin, Dec 26 2014

Status

approved