OFFSET
1,2
COMMENTS
Diagonal of A229578.
FORMULA
Empirical (for n>=9): a(n) = 9*a(n-1) - 33*a(n-2) + 63*a(n-3) - 66*a(n-4) + 36*a(n-5) - 8*a(n-6). - Vaclav Kotesovec, Feb 14 2014
EXAMPLE
Some solutions for n=3:
0 1 2 0 1 0 0 1 0 0 1 1 0 1 0 0 1 0 0 1 2
3 2 3 2 3 2 1 2 3 2 3 2 2 2 3 2 3 3 2 1 0
1 0 1 0 1 2 3 0 1 0 1 0 1 0 1 1 0 1 0 3 2
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin, Sep 26 2013
STATUS
approved