OFFSET
1,1
COMMENTS
Column 5 of A223692
LINKS
R. H. Hardin, Table of n, a(n) for n = 1..210
FORMULA
Empirical: a(n) = 144*a(n-1) -7582*a(n-2) +191344*a(n-3) -2550861*a(n-4) +18205352*a(n-5) -64961020*a(n-6) +89885952*a(n-7) for n>8
EXAMPLE
Some solutions for n=3
..0..1..9.15..7....0..8..0..1..0....0..8..0..1..0....0..1..9.15.13
..9.15..7.15..9...10..8..0..8.10....0..1..9..1..9....9.15.13.11.13
..9.15..7.15..9....0..8.10..2..3....9..1..9..1..9....7.15.13.15.13
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin Mar 25 2013
STATUS
approved