OFFSET
1,1
COMMENTS
Column 4 of A266033.
LINKS
R. H. Hardin, Table of n, a(n) for n = 1..210
FORMULA
Empirical: a(n) = 11*a(n-1) +231*a(n-2) -100*a(n-3) -7612*a(n-4) -1116*a(n-5) +74582*a(n-6) -64354*a(n-7) -370540*a(n-8) +661109*a(n-9) +1260417*a(n-10) +252581*a(n-11) -15283*a(n-12) +86793*a(n-13) -32631*a(n-14) +2989*a(n-15) -36*a(n-16) for n>17
EXAMPLE
Some solutions for n=4
..0..2..2..0....0..0..0..2....0..0..2..0....0..2..3..1....0..0..0..2
..1..0..0..1....2..0..0..1....1..2..4..0....1..0..0..1....2..1..1..1
..0..0..1..2....2..1..4..0....0..3..0..0....0..0..4..1....2..0..0..2
..0..3..1..0....2..0..3..0....0..2..3..0....0..0..0..0....1..3..0..0
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin, Dec 20 2015
STATUS
approved