A225020 Number of (n+1)X2 0..2 matrices with each 2X2 permanent equal

81, 253, 759, 2653, 9273, 34545, 130067, 502563, 1957855, 7707477, 30479641, 121049341, 481805459, 1921111559, 7667874767, 30628405561, 122397615337, 489285404561, 1956323203363, 7823125185531, 31286692332191, 125131311950285

Offset

1,1

Comments

Column 1 of A225027

Links

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

Formula

Empirical: a(n) = 6*a(n-1) +8*a(n-2) -89*a(n-3) -3*a(n-4) +522*a(n-5) -118*a(n-6) -1489*a(n-7) +342*a(n-8) +2002*a(n-9) -380*a(n-10) -992*a(n-11) +192*a(n-12)

Example

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

Crossrefs

Sequence in context: A236886 A206142 A225027 * A219131 A236789 A236798

Adjacent sequences: A225017 A225018 A225019 * A225021 A225022 A225023

Keyword

nonn

Author

R. H. Hardin Apr 24 2013

Status

approved