A204626 Number of (n+1)X5 0..2 arrays with every 2X2 subblock having unequal diagonal elements or unequal antidiagonal elements, and new values 0..2 introduced in row major order

6144, 933462, 141832254, 21550390395, 3274427479938, 497525810748759, 75595484720747496, 11486192649538372653, 1745244733464500021670, 265177441526573391694167, 40291813604266663731304284

Offset

1,1

Comments

Column 4 of A204630

Links

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

Formula

Empirical: a(n) = 165*a(n-1) -2025*a(n-2) +6241*a(n-3) -270*a(n-4) -17282*a(n-5) +5524*a(n-6) +11864*a(n-7) +1568*a(n-8)

Example

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

Crossrefs

Sequence in context: A152388 A251787 A203982 * A318251 A281265 A007992

Adjacent sequences: A204623 A204624 A204625 * A204627 A204628 A204629

Keyword

nonn

Author

R. H. Hardin Jan 17 2012

Status

approved