OFFSET
1,1
COMMENTS
Column 2 of A251167
LINKS
R. H. Hardin, Table of n, a(n) for n = 1..210
FORMULA
Empirical: a(n) = 19*a(n-1) -168*a(n-2) +970*a(n-3) -4128*a(n-4) +13682*a(n-5) -36699*a(n-6) +81639*a(n-7) -152877*a(n-8) +243851*a(n-9) -334774*a(n-10) +399797*a(n-11) -419549*a(n-12) +389921*a(n-13) -322480*a(n-14) +237093*a(n-15) -153433*a(n-16) +85514*a(n-17) -39795*a(n-18) +15112*a(n-19) -4770*a(n-20) +1351*a(n-21) -352*a(n-22) +70*a(n-23) -7*a(n-24) for n>27
EXAMPLE
Some solutions for n=4
..0..0..0....1..2..3....1..0..1....1..0..0....1..0..0....3..0..3....0..2..3
..1..0..0....0..1..2....1..1..0....1..1..0....2..0..0....3..0..1....1..0..1
..1..1..1....2..0..2....2..1..1....0..1..1....2..1..1....3..3..0....1..0..0
..0..0..1....3..0..2....3..0..0....0..0..0....3..0..1....0..3..0....2..1..1
..2..0..0....3..0..2....3..3..3....2..2..1....3..2..1....0..3..2....3..2..0
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin, Nov 30 2014
STATUS
approved