OFFSET
1,1
LINKS
R. H. Hardin, Table of n, a(n) for n = 1..210
FORMULA
Empirical: a(n) = n^6 + 6*n^5 + 11*n^4 + 2*n^3 + 6*n - 4.
Conjectures from Colin Barker, Jan 13 2019: (Start)
G.f.: 2*x*(11 + 151*x + 208*x^2 - 6*x^3 - 13*x^4 + 11*x^5 - 2*x^6) / (1 - x)^7.
a(n) = 7*a(n-1) - 21*a(n-2) + 35*a(n-3) - 35*a(n-4) + 21*a(n-5) - 7*a(n-6) + a(n-7) for n>7.
(End)
EXAMPLE
Some solutions for n=6:
2 0 2 3 6 4 4 4 3 2 3 6 0 3 1 2
5 2 6 2 3 2 2 2 2 4 1 0 5 2 5 6
2 4 4 6 4 4 5 1 2 4 1 4 4 2 0 0
0 0 0 4 6 1 4 2 4 2 3 0 5 0 3 0
0 4 3 4 1 0 2 4 4 3 6 5 5 0 5 1
6 2 0 5 0 1 2 5 6 4 5 6 1 2 2 2
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin, Feb 04 2016
STATUS
approved