A252773 Number of (n+2)X(3+2) 0..3 arrays with every consecutive three elements in every row, column and nw-se diagonal having exactly two distinct values, and new values 0 upwards introduced in row major order

4687, 23114, 129870, 797340, 5171516, 34241905, 231889793, 1600079329, 11101235991, 77978854894, 553317363901, 3930371657015, 28133917383382, 202467448289241, 1456058664605429, 10522550922399483, 76243229044824767

Offset

1,1

Comments

Column 3 of A252777

Links

R. H. Hardin, Table of n, a(n) for n = 1..78

Example

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

Crossrefs

Sequence in context: A218096 A293583 A263066 * A368192 A204073 A256808

Adjacent sequences: A252770 A252771 A252772 * A252774 A252775 A252776

Keyword

nonn

Author

R. H. Hardin, Dec 21 2014

Status

approved