OFFSET
1,1
COMMENTS
Column 5 of A252423
LINKS
R. H. Hardin, Table of n, a(n) for n = 1..210
FORMULA
Empirical: a(n) = 76*a(n-3) -2082*a(n-6) +27585*a(n-9) -201704*a(n-12) +870200*a(n-15) -2284208*a(n-18) +3690384*a(n-21) -3708548*a(n-24) +2399781*a(n-27) -1049128*a(n-30) +305470*a(n-33) -52269*a(n-36) +4604*a(n-39) -160*a(n-42) for n>47
EXAMPLE
Some solutions for n=4
..1..1..2..1..1..2..1....3..0..1..0..3..1..0....0..1..0..0..1..0..3
..0..3..1..0..0..1..0....0..0..1..0..0..1..0....1..2..1..1..2..1..1
..0..0..1..0..3..1..0....1..1..2..1..1..2..1....0..1..0..3..1..0..0
..1..1..2..1..1..2..1....0..0..1..0..0..1..0....0..1..0..0..1..0..3
..0..0..1..3..0..1..0....0..0..1..3..0..1..3....1..2..1..1..2..1..1
..0..3..1..0..0..1..0....1..1..2..1..1..2..1....0..1..0..3..1..0..0
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin, Dec 17 2014
STATUS
approved