A210307 Number of (n+1)X7 0..3 arrays containing all values 0..3 with every 2X2 subblock having one or three distinct values, and new values 0..3 introduced in row major order

446093, 339125187, 249417760123, 183304255111499, 134683159775208043, 98959142504758664603, 72710583058655511309563, 53424368715204078393901419, 39253750829733683281599662459, 28841837470421440080166974554235

Offset

1,1

Comments

Column 6 of A210309

Links

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

Example

Some solutions for n=4
..0..0..0..0..0..1..0....0..0..0..0..0..0..1....0..0..0..1..0..1..2
..1..2..1..3..1..2..1....2..1..2..1..3..1..3....1..2..1..2..1..2..3
..1..0..1..2..3..2..3....3..1..3..3..0..1..0....2..3..1..0..0..0..2
..2..0..2..3..0..2..0....0..1..0..1..1..2..0....3..0..1..2..1..3..2
..1..2..3..0..1..2..3....3..0..3..1..1..3..2....3..1..3..2..3..2..1

Crossrefs

Sequence in context: A270610 A224634 A251349 * A210173 A202569 A224635

Adjacent sequences: A210304 A210305 A210306 * A210308 A210309 A210310

Keyword

nonn

Author

R. H. Hardin Mar 19 2012

Status

approved