OFFSET
1,1
COMMENTS
Column 4 of A221125.
LINKS
R. H. Hardin, Table of n, a(n) for n = 1..18
FORMULA
Empirical: a(n) = 109*a(n-1) - 1680*a(n-2) + 8230*a(n-3) - 13300*a(n-4) + 2025*a(n-5) for n>6.
Empirical g.f.: x*(21 - 339*x + 2030*x^2 - 4307*x^3 + 1200*x^4 + 2880*x^5) / (1 - 109*x + 1680*x^2 - 8230*x^3 + 13300*x^4 - 2025*x^5). - Colin Barker, Aug 03 2018
EXAMPLE
Some solutions for n=3:
1 1 1 0 0 3 1 1 0 2 0 2 1 1 0 1 1 0 2 0
1 2 1 1 1 1 1 2 1 3 0 1 0 1 3 0 0 3 4 0
0 1 3 0 0 1 0 1 0 0 1 2 0 3 1 1 0 1 1 0
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin, Jan 02 2013
STATUS
approved