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A210312 Number of (n+1)X(n+1) 0..3 arrays containing all values 0..3 with every 2X2 subblock having two or three distinct values, and new values 0..3 introduced in row major order 0
0, 4125, 58464712, 7415631633670, 11219641807667569855, 214148948714201593922295166, 51994819539384403072547129110683133, 160715710349516432110880775618321863607017118 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

COMMENTS

Diagonal of A210320

LINKS

Table of n, a(n) for n=1..8.

EXAMPLE

Some solutions for n=4

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

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

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

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

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

CROSSREFS

Sequence in context: A168462 A045032 A196896 * A125502 A168631 A117810

Adjacent sequences:  A210309 A210310 A210311 * A210313 A210314 A210315

KEYWORD

nonn

AUTHOR

R. H. Hardin Mar 20 2012

STATUS

approved

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Last modified December 12 22:06 EST 2019. Contains 329963 sequences. (Running on oeis4.)