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A209967 Number of (n+1)X7 0..3 arrays containing all values 0..3 with every 2X2 subblock having one or two distinct values, and new values 0..3 introduced in row major order 1
17262, 3745144, 795773818, 176163769267, 38303320167422, 8191570949391204, 1725096441495004196, 358792884816460002669, 73884793608220074063313, 15095735190392461348923878, 3065184253013978227031816509 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 6 of A209969

LINKS

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

EXAMPLE

Some solutions for n=4

..0..0..0..0..0..0..0....0..0..0..0..0..0..0....0..0..0..0..1..2..1

..0..0..0..1..1..0..0....1..0..0..0..0..0..2....1..1..1..1..1..2..1

..2..0..1..0..0..0..2....0..0..2..2..0..2..2....1..2..2..2..1..2..1

..2..0..0..0..0..0..0....3..0..0..2..0..2..2....1..2..3..2..1..2..1

..2..2..2..2..2..0..3....3..0..2..2..0..2..2....1..2..2..2..1..2..1

CROSSREFS

Sequence in context: A076774 A236447 A094413 * A093790 A229683 A228379

Adjacent sequences:  A209964 A209965 A209966 * A209968 A209969 A209970

KEYWORD

nonn

AUTHOR

R. H. Hardin Mar 16 2012

STATUS

approved

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Last modified July 24 01:41 EDT 2021. Contains 346269 sequences. (Running on oeis4.)