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A210347 1/4 the number of (n+1)X(n+1) 0..3 arrays with every 2X2 subblock having one, two or three distinct clockwise edge differences 0
40, 13566, 38415623, 934012605398, 193382034306882852, 341167083547574037214431, 5125371159957295208758939227336, 655672443742537489846231752745295823823 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Diagonal of A210355

LINKS

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

EXAMPLE

Some solutions for n=4

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

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

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

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

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

CROSSREFS

Sequence in context: A119525 A309553 A123381 * A221391 A279578 A159680

Adjacent sequences:  A210344 A210345 A210346 * A210348 A210349 A210350

KEYWORD

nonn

AUTHOR

R. H. Hardin Mar 20 2012

STATUS

approved

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Last modified September 17 06:16 EDT 2021. Contains 347478 sequences. (Running on oeis4.)