OFFSET
1,1
COMMENTS
Column 2 of A268073.
LINKS
R. H. Hardin, Table of n, a(n) for n = 1..210
FORMULA
Empirical: a(n) = 26*a(n-1) -109*a(n-2) -1668*a(n-3) +10384*a(n-4) +30340*a(n-5) -193268*a(n-6) -33480*a(n-7) +882432*a(n-8) -461376*a(n-9) -1073088*a(n-10) +839808*a(n-11) for n>13
EXAMPLE
Some solutions for n=5
..0..1....0..1....0..1....0..1....0..0....0..1....0..1....0..1....0..1....0..1
..0..2....0..0....2..3....1..0....1..0....1..2....0..0....1..2....1..1....2..3
..2..1....1..2....2..3....2..0....1..1....0..3....2..2....1..3....2..3....2..2
..2..0....0..3....1..2....2..1....0..0....0..1....3..3....3..3....2..3....0..2
..1..0....1..1....0..2....0..2....2..3....1..2....1..2....0..0....3..1....3..3
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin, Jan 25 2016
STATUS
approved