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

5, 171, 33003, 25302763, 71285876395, 732967188022763, 27496666418419018091, 3763456875799574658077867, 1879339285974060290837281959275, 3424008152076665406983529256359040747

Offset

1,1

Links

R. H. Hardin, Table of n, a(n) for n = 1..11

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

Adjacent sequences: A210829 A210830 A210831 * A210833 A210834 A210835

Keyword

nonn

Author

R. H. Hardin Mar 27 2012

Status

approved