OFFSET
1,1
COMMENTS
Column 3 of A233618
LINKS
R. H. Hardin, Table of n, a(n) for n = 1..210
FORMULA
Empirical: a(n) = 216*a(n-1) -3582*a(n-2) -127224*a(n-3) +2457495*a(n-4) +21025008*a(n-5) -505022364*a(n-6) -258645312*a(n-7) +37921168656*a(n-8) -199403171712*a(n-9) +265276451520*a(n-10) +271825694208*a(n-11) -396718580736*a(n-12)
EXAMPLE
Some solutions for n=1
..0..0..0..0..1....0..0..0..0..0....0..0..0..0..2....0..0..0..0..2
..0..2..1..0..2....1..2..1..1..0....1..1..0..2..0....1..2..1..0..0
..1..2..0..0..1....0..2..2..1..1....0..1..0..2..1....0..0..1..0..1
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin, Dec 14 2013
STATUS
approved