A186784 Number of (n+1)X3 0..3 arrays with every 2X2 subblock determinant equal to exactly one or two horizontal and vertical neighbor 2X2 subblock determinants

580, 11354, 63504, 739334, 8499038, 97501656, 1029483706, 11412065338, 126395136040, 1397513210452, 15414550870912, 170592128024378, 1886912171155070, 20866267731905124, 230752006350156298

Offset

1,1

Comments

Column 2 of A186786

Links

R. H. Hardin, Table of n, a(n) for n = 1..200

Example

Some solutions for 5X3
..2..0..1....3..0..0....1..0..2....2..0..1....1..0..0....2..0..1....0..0..1
..0..0..0....0..0..2....0..0..0....0..0..1....0..0..0....1..0..0....0..0..0
..0..3..0....0..1..2....2..3..1....2..1..1....1..2..2....2..2..0....3..1..1
..1..2..1....0..2..2....0..1..1....2..2..1....2..2..1....1..2..1....2..1..2
..3..3..3....0..2..2....2..3..1....1..2..2....1..2..2....2..2..0....3..1..1

Crossrefs

Sequence in context: A185609 A127694 A185605 * A185606 A206616 A172763

Adjacent sequences: A186781 A186782 A186783 * A186785 A186786 A186787

Keyword

nonn

Author

R. H. Hardin Feb 26 2011

Status

approved