OFFSET
1,1
LINKS
R. H. Hardin, Table of n, a(n) for n = 1..210
FORMULA
Empirical: a(n) = (2/3)*n^4 + (10/3)*n^3 + (16/3)*n^2 + (11/3)*n + 1.
Conjectures from Colin Barker, Nov 11 2018: (Start)
G.f.: x*(14 - 3*x + 9*x^2 - 5*x^3 + x^4) / (1 - x)^5.
a(n) = 5*a(n-1) - 10*a(n-2) + 10*a(n-3) - 5*a(n-4) + a(n-5) for n>5.
(End)
EXAMPLE
Some solutions for n=6:
3 6 0 3 0 4 1 4 1 4 3 6 6 4 0 2
1 4 3 3 1 0 4 5 4 6 3 0 6 1 2 6
4 4 5 4 5 3 2 4 3 2 5 5 6 4 2 2
5 0 5 5 6 3 4 5 4 5 4 5 4 5 4 3
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin, Nov 13 2014
STATUS
approved