OFFSET
1,1
COMMENTS
Column 4 of A230935
LINKS
R. H. Hardin, Table of n, a(n) for n = 1..210
FORMULA
Empirical: a(n) = 5*a(n-1) +a(n-2) +11*a(n-3) -a(n-4) -33*a(n-5) -82*a(n-6) +a(n-7) -33*a(n-8) +71*a(n-9) +125*a(n-10) +117*a(n-11) +140*a(n-12) +66*a(n-13) +35*a(n-14) +2*a(n-15) -4*a(n-16) -4*a(n-17)
EXAMPLE
Some solutions for n=4
..x..0..x..2..x..2....x..0..x..0..x..2....x..0..x..0..x..0....x..0..x..2..x..0
..1..x..3..x..3..x....1..x..1..x..3..x....1..x..1..x..1..x....1..x..3..x..1..x
..x..2..x..0..x..2....x..2..x..2..x..0....x..2..x..2..x..0....x..2..x..0..x..2
..3..x..1..x..3..x....1..x..3..x..1..x....3..x..1..x..3..x....1..x..3..x..3..x
..x..0..x..0..x..2....x..0..x..0..x..0....x..0..x..2..x..2....x..2..x..2..x..2
..3..x..3..x..1..x....3..x..3..x..3..x....3..x..3..x..1..x....1..x..1..x..1..x
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin, Nov 01 2013
STATUS
approved