OFFSET
1,1
COMMENTS
Column 2 of A250561
LINKS
R. H. Hardin, Table of n, a(n) for n = 1..106
FORMULA
Empirical: a(n) = 4*a(n-1) +2*a(n-2) -17*a(n-3) -3*a(n-4) +24*a(n-5) +16*a(n-6) -13*a(n-7) -26*a(n-8) +2*a(n-9) +12*a(n-10) for n>15
EXAMPLE
Some solutions for n=6
..2....1....2....0....0....2....0....2....0....2....2....2....1....2....1....0
..1....0....2....2....0....0....2....2....0....2....0....1....0....2....1....0
..2....1....2....1....1....2....2....1....0....0....2....0....1....1....1....2
..1....0....0....0....2....2....0....2....2....2....0....0....0....0....2....2
..1....0....0....0....1....1....0....0....1....1....1....0....0....1....2....0
..1....0....0....0....0....2....0....1....1....2....1....2....1....0....1....2
..2....1....0....1....1....1....2....1....2....2....0....0....1....0....0....2
..1....2....0....1....1....1....0....1....2....0....0....1....0....2....2....2
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin, Nov 25 2014
STATUS
approved