A205165 Number of (n+1)X4 0..3 arrays with every 2X2 subblock having unequal diagonal elements or unequal antidiagonal elements, and new values 0..3 introduced in row major order

2277, 474853, 100138314, 21125224557, 4456641224469, 940186880752830, 198344748421652865, 41843425013764138653, 8827419081375312655218, 1862259784246483153159029, 392868116042984604835902933

Offset

1,1

Comments

Column 3 of A205170

Links

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

Formula

Empirical: a(n) = 224*a(n-1) -2803*a(n-2) +11196*a(n-3) -16677*a(n-4) +9438*a(n-5) -1728*a(n-6)

Example

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

Crossrefs

Sequence in context: A349941 A349938 A195222 * A166222 A203725 A247401

Adjacent sequences: A205162 A205163 A205164 * A205166 A205167 A205168

Keyword

nonn

Author

R. H. Hardin Jan 22 2012

Status

approved