OFFSET
1,1
COMMENTS
Column 3 of A251249
LINKS
R. H. Hardin, Table of n, a(n) for n = 1..210
FORMULA
Empirical: a(n) = 81*a(n-1) -1165*a(n-2) +4257*a(n-3) -544*a(n-4) -4428*a(n-5) +7512*a(n-6) -80352*a(n-7) -67376*a(n-8) +32256*a(n-9) +20160*a(n-10)
EXAMPLE
Some solutions for n=1
..2..1..1..2....1..2..2..0....2..2..0..0....0..2..2..1....0..2..2..0
..0..2..0..2....0..0..0..1....1..0..0..2....1..2..0..2....0..1..2..2
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin, Dec 01 2014
STATUS
approved