A224741 Number of (n+1)X5 0..1 matrices with each 2X2 permanent equal

218, 2326, 18257, 180546, 1644874, 15845297, 149592266, 1430571502, 13614536577, 129950804946, 1238946474290, 11820093210897, 112737919290762, 1075442141143398, 10258311796135505, 97854415488287106, 933422603498234490

Offset

1,1

Comments

Column 4 of A224745

Links

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

Formula

Empirical: a(n) = 13*a(n-1) +a(n-2) -436*a(n-3) +747*a(n-4) +3955*a(n-5) -7874*a(n-6) -12461*a(n-7) +25451*a(n-8) +13120*a(n-9) -30315*a(n-10) -175*a(n-11) +9975*a(n-12) -2000*a(n-13)

Example

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

Crossrefs

Sequence in context: A321115 A253732 A232513 * A209824 A230333 A060530

Adjacent sequences: A224738 A224739 A224740 * A224742 A224743 A224744

Keyword

nonn

Author

R. H. Hardin Apr 17 2013

Status

approved