OFFSET
1,1
COMMENTS
Column 1 of A204284
LINKS
R. H. Hardin, Table of n, a(n) for n = 1..210
FORMULA
Empirical: a(n) = 4*a(n-1) -3*a(n-2) +10*a(n-3) -44*a(n-4) +60*a(n-5) -30*a(n-6) -172*a(n-7) -152*a(n-8) +1224*a(n-9) -448*a(n-10) -656*a(n-11) +880*a(n-12) -2592*a(n-13) +2688*a(n-14) -768*a(n-15) for n>16
EXAMPLE
Some solutions for n=4
..0..0..0....0..1..2....0..1..2....0..0..1....0..0..0....0..0..1....0..0..0
..1..1..0....1..1..1....0..0..2....0..0..0....1..1..0....1..1..1....0..0..1
..0..0..0....1..1..1....0..0..0....1..0..0....0..0..0....1..2..1....2..0..0
..0..1..0....2..1..2....2..0..0....0..0..1....0..2..0....1..2..1....0..0..0
..0..1..0....1..2..1....0..0..1....0..0..0....0..2..0....1..1..1....2..0..0
..0..0..0....2..2..2....0..0..0....2..0..0....0..0..0....1..0..0....1..1..0
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin Jan 13 2012
STATUS
approved