A206175 Number of 7X(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

609086, 53494742, 7934434238, 1412613762182, 261163772277422, 48801583349072774

Offset

1,1

Comments

Row 6 of A206169

Links

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

Example

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

Crossrefs

Sequence in context: A340924 A218107 A274173 * A205429 A308279 A195281

Adjacent sequences: A206172 A206173 A206174 * A206176 A206177 A206178

Keyword

nonn

Author

R. H. Hardin Feb 04 2012

Status

approved