OFFSET
1,1
LINKS
R. H. Hardin, Table of n, a(n) for n = 1..210
FORMULA
Empirical: a(n) = 6*a(n-1) +52*a(n-2) -367*a(n-3) -995*a(n-4) +9350*a(n-5) +7034*a(n-6) -128869*a(n-7) +26637*a(n-8) +1045428*a(n-9) -801048*a(n-10) -5098437*a(n-11) +5754163*a(n-12) +14714982*a(n-13) -20381230*a(n-14) -23985995*a(n-15) +38063780*a(n-16) +20215810*a(n-17) -35199080*a(n-18) -8246780*a(n-19) +13170048*a(n-20) +2801112*a(n-21) -1572480*a(n-22) -393120*a(n-23).
EXAMPLE
Some solutions for n=4:
4 1 4 5 6 3 4 2 6 2 3 0 6 2 6 6 3 5 1 5 1
0 2 0 6 2 4 3 6 5 6 2 4 0 1 0 3 5 2 2 1 2
6 3 6 3 4 1 2 0 4 2 3 0 6 2 6 5 2 4 0 4 0
3 5 3 6 2 4 1 4 3 4 0 2 5 6 5 3 5 2 3 2 3
5 2 5 4 5 2 4 2 6 5 6 3 4 0 4 5 2 4 6 0 6
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin, Jan 04 2014
STATUS
approved