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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 1
446093, 339125187, 249417760123, 183304255111499, 134683159775208043, 98959142504758664603, 72710583058655511309563, 53424368715204078393901419, 39253750829733683281599662459, 28841837470421440080166974554235 (list; graph; refs; listen; history; text; internal format)
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

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Last modified July 12 21:31 EDT 2020. Contains 335669 sequences. (Running on oeis4.)