A252846 Number of (2+2)X(n+2) 0..3 arrays with every consecutive three elements in every row and diagonal having one or two distinct values, and in every column and antidiagonal having two or three distinct values, and new values 0 upwards introduced in row major order

24951, 510488, 10339272, 211956317, 4399478503, 91508212229, 1899442031533, 39473901606827, 820481977746360, 17052636742617510, 354435913127430588, 7367086725869394640, 153127676728925828062, 3182825252631739077552

Offset

1,1

Comments

Row 2 of A252844

Links

R. H. Hardin, Table of n, a(n) for n = 1..64

Example

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

Crossrefs

Sequence in context: A138717 A139776 A214013 * A031651 A263815 A125268

Adjacent sequences: A252843 A252844 A252845 * A252847 A252848 A252849

Keyword

nonn

Author

R. H. Hardin, Dec 22 2014

Status

approved