OFFSET
1,2
COMMENTS
Column 3 of A203397
LINKS
R. H. Hardin, Table of n, a(n) for n = 1..210
FORMULA
Empirical: a(n) = 64*a(n-1) -1706*a(n-2) +30044*a(n-3) -404960*a(n-4) +4099850*a(n-5) -30536063*a(n-6) +171426725*a(n-7) -757277294*a(n-8) +2720190934*a(n-9) -8042244702*a(n-10) +19622828742*a(n-11) -39893786618*a(n-12) +68882173897*a(n-13) -102395699308*a(n-14) +129694096680*a(n-15) -135121114784*a(n-16) +110642585924*a(n-17) -68014475760*a(n-18) +29890935888*a(n-19) -8795890848*a(n-20) +1545208704*a(n-21) -122145408*a(n-22) for n>23
EXAMPLE
Some solutions for n=4
..0..2..1....1..1..3....1..0..2....1..0..0....2..2..0....3..3..2....1..2..1
..1..3..1....2..0..3....1..0..2....1..0..3....2..2..1....1..3..2....1..2..2
..0..3..1....2..3..3....1..2..2....1..3..3....1..0..1....0..1..1....0..3..0
..0..3..3....1..3..3....1..1..2....1..1..3....1..1..0....0..0..1....0..3..3
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin Jan 01 2012
STATUS
approved