A206176 Number of 8X(n+1) 0..3 arrays with every 2X2 subblock in a row having an equal number of equal diagonal or equal antidiagonal elements, adjacent rows differing in this number, and new values 0..3 introduced in row major order

5514982, 850283062, 257597022598, 99795262195942, 41314757480152390, 17594902146494956438

Offset

1,1

Comments

Row 7 of A206169

Links

Table of n, a(n) for n=1..6.

Example

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

Crossrefs

Sequence in context: A230793 A263197 A283652 * A205430 A208455 A207825

Adjacent sequences: A206173 A206174 A206175 * A206177 A206178 A206179

Keyword

nonn

Author

R. H. Hardin Feb 04 2012

Status

approved