OFFSET
1,1
LINKS
R. H. Hardin, Table of n, a(n) for n = 1..210
FORMULA
Empirical: a(n) = 3*a(n-1) +20*a(n-2) -60*a(n-3) -110*a(n-4) +376*a(n-5) +70*a(n-6) -758*a(n-7) +309*a(n-8) +455*a(n-9) -336*a(n-10) -16*a(n-11) +60*a(n-12) -12*a(n-13).
EXAMPLE
Some solutions for n=5:
1 2 3 1 0 1 1 0 1 2 3 2 4 3 4 0 1 0 1 4 3
0 3 2 3 4 3 4 1 4 1 0 1 0 1 0 1 0 1 0 1 2
1 2 3 4 3 0 1 0 1 0 1 0 1 0 1 4 1 4 1 4 3
2 1 4 1 2 1 4 1 4 4 3 4 0 1 4 3 2 3 0 1 2
1 2 3 4 3 4 1 0 1 3 4 3 1 0 1 2 3 2 1 0 3
2 1 4 3 4 3 3 4 3 4 3 4 4 1 0 3 2 3 0 1 2
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin, Jan 01 2014
STATUS
approved