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A210829 Number of (n+1)X(n+1) 0..3 symmetric matrices with every 2X2 subblock having three distinct values, and new values 0..3 introduced in lower triangle row major order 0
1, 16, 576, 49472, 10026880, 4815077632, 5473511562368, 14733719832477184, 93906982985442212608, 1417227544723589396820800 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

LINKS

Table of n, a(n) for n=1..10.

EXAMPLE

Some solutions for n=3

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

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

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

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

CROSSREFS

Sequence in context: A063082 A223197 A089156 * A222845 A187403 A265638

Adjacent sequences:  A210826 A210827 A210828 * A210830 A210831 A210832

KEYWORD

nonn

AUTHOR

R. H. Hardin Mar 27 2012

STATUS

approved

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Last modified July 8 03:38 EDT 2020. Contains 335504 sequences. (Running on oeis4.)