OFFSET
1,2
LINKS
Andrew Howroyd, Table of n, a(n) for n = 1..100
EXAMPLE
All solutions for n=3:
..2....2....1....3....2....1....1
..2....2....1....3....3....2....1
..2....3....2....3....3....2....1
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin, Mar 01 2012
EXTENSIONS
a(17)-a(30) from Andrew Howroyd, Mar 03 2017
STATUS
approved