OFFSET
1,2
COMMENTS
Row 5 of A209007.
LINKS
R. H. Hardin, Table of n, a(n) for n = 1..210
FORMULA
Empirical: a(n) = 2*a(n-1) - 2*a(n-3) + a(n-4) + a(n-5) - 2*a(n-6) + 2*a(n-8) - a(n-9) + a(n-10) - 2*a(n-11) + 2*a(n-13) - a(n-14) - a(n-15) + 2*a(n-16) - 2*a(n-18) + a(n-19).
EXAMPLE
Some solutions for n=6:
-2 -1 -3 -2 -2 -3 -2 -1 -3 -2 -3 -3 -1 -4 -4 -2
-1 -1 -2 1 1 -2 -1 -1 -1 0 -3 0 0 -3 1 0
0 2 0 0 -1 2 2 0 3 2 1 0 1 3 4 2
3 0 3 2 1 1 1 1 3 1 3 3 0 4 2 0
0 0 2 -1 1 2 0 1 -2 -1 2 0 0 0 -3 0
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin, Mar 04 2012
STATUS
approved