A206213 Number of (n+1)X7 0..2 arrays with every 2X3 or 3X2 subblock having exactly two equal edges, and new values 0..2 introduced in row major order

8802, 9072, 14416, 74080, 359424, 1764000, 9438912, 46540800, 228988224, 1227058560, 6050304000, 29768469120, 159517612800, 786539520000, 3869900985600, 20737289664000, 102250137600000, 503087128128000

Offset

1,1

Comments

Column 6 of A206215

Links

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

Formula

Empirical: a(n) = 130*a(n-3) for n>9

Example

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

Crossrefs

Sequence in context: A249956 A031791 A179128 * A270609 A230335 A183752

Adjacent sequences: A206210 A206211 A206212 * A206214 A206215 A206216

Keyword

nonn

Author

R. H. Hardin Feb 04 2012

Status

approved