OFFSET
1,1
COMMENTS
Column 2 of A252423
LINKS
R. H. Hardin, Table of n, a(n) for n = 1..210
FORMULA
Empirical: a(n) = 23*a(n-3) -199*a(n-6) +843*a(n-9) -1874*a(n-12) +2149*a(n-15) -1091*a(n-18) +15*a(n-21) +197*a(n-24) -70*a(n-27) +8*a(n-30) for n>37
EXAMPLE
Some solutions for n=4
..1..0..2..2....1..1..2..1....3..1..0..0....0..0..1..0....0..0..1..0
..0..3..0..0....3..0..1..3....0..1..0..3....0..0..1..0....0..3..1..0
..2..0..2..2....0..0..1..0....1..2..1..1....1..1..2..1....1..1..2..1
..2..0..2..2....1..1..2..1....0..1..3..0....0..0..1..0....0..0..1..0
..0..3..0..0....0..0..1..3....3..1..0..0....0..0..1..0....3..0..1..3
..2..0..2..2....0..3..1..0....1..2..1..1....1..1..2..1....1..1..2..1
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin, Dec 17 2014
STATUS
approved