OFFSET
1,1
COMMENTS
Column 5 of A229534.
LINKS
R. H. Hardin, Table of n, a(n) for n = 1..210
FORMULA
Empirical: a(n) = 28*a(n-1) - 286*a(n-2) + 1290*a(n-3) - 2373*a(n-4) + 304*a(n-5) + 3551*a(n-6) - 2846*a(n-7) - 546*a(n-8) + 1308*a(n-9) - 505*a(n-10) + 76*a(n-11) - 4*a(n-12) for n > 13.
EXAMPLE
Some solutions for n=4:
0 1 2 1 0 0 1 2 1 2 0 1 2 1 2 0 1 0 2 0
0 1 2 0 2 2 1 2 1 2 2 1 0 1 0 2 1 2 1 0
2 1 2 1 2 2 1 2 1 0 0 1 2 1 2 0 1 0 1 0
2 0 2 1 2 2 1 2 0 2 2 0 2 1 0 2 1 0 1 0
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin, Sep 25 2013
STATUS
approved