OFFSET
1,1
COMMENTS
Column 4 of A210095
LINKS
R. H. Hardin, Table of n, a(n) for n = 1..210
FORMULA
Empirical: a(n) = 92*a(n-1) -2759*a(n-2) +28247*a(n-3) -12894*a(n-4) -1142474*a(n-5) +3601421*a(n-6) +11970542*a(n-7) -56246539*a(n-8) -20466947*a(n-9) +259395248*a(n-10) -85275847*a(n-11) -451433420*a(n-12) +270874469*a(n-13) +310376692*a(n-14) -241516822*a(n-15) -72716144*a(n-16) +82685288*a(n-17) -2658056*a(n-18) -9212400*a(n-19) +1726736*a(n-20) +40928*a(n-21) -15360*a(n-22)
EXAMPLE
Some solutions for n=4
..0..0..0..1..1....0..1..1..2..1....0..1..0..2..1....0..0..1..0..2
..0..1..1..1..1....1..1..1..1..1....0..1..0..2..1....2..0..0..0..2
..1..0..0..0..1....1..2..1..2..1....0..0..0..2..2....2..0..1..0..2
..0..0..2..0..0....1..2..1..2..1....0..0..0..2..2....2..0..0..0..2
..2..2..0..2..2....1..1..2..1..1....0..1..0..2..0....0..2..2..2..2
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin Mar 17 2012
STATUS
approved