A210832 - OEIS

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

(list; graph; refs; listen; history; text; internal format)

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