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A210832
Number of (n+1)X(n+1) 0..3 symmetric matrices with every 2X2 subblock having one, two or three distinct values, and new values 0..3 introduced in lower triangle row major order
1
5, 171, 33003, 25302763, 71285876395, 732967188022763, 27496666418419018091, 3763456875799574658077867, 1879339285974060290837281959275, 3424008152076665406983529256359040747
OFFSET
1,1
LINKS
EXAMPLE
Some solutions for n=3
..0..1..3..0....0..1..1..2....0..1..1..3....0..1..2..0....0..1..2..0
..1..2..3..0....1..2..3..1....1..2..2..3....1..2..3..0....1..0..2..2
..3..3..3..2....1..3..3..3....1..2..2..2....2..3..0..3....2..2..3..0
..0..0..2..3....2..1..3..3....3..3..2..1....0..0..3..2....0..2..0..3
CROSSREFS
Sequence in context: A279382 A157234 A231279 * A206393 A220640 A198711
KEYWORD
nonn
AUTHOR
R. H. Hardin Mar 27 2012
STATUS
approved