OFFSET
1,1
COMMENTS
Column 2 of A251779.
LINKS
R. H. Hardin, Table of n, a(n) for n = 1..210
FORMULA
Empirical: a(n) = a(n-1) +82*a(n-3) -82*a(n-4) -2074*a(n-6) +2074*a(n-7) +19954*a(n-9) -19954*a(n-10) -70907*a(n-12) +70907*a(n-13) -8204*a(n-15) +8204*a(n-16) +575830*a(n-18) -575830*a(n-19) -914592*a(n-21) +914592*a(n-22) -424248*a(n-24) +424248*a(n-25) +1366560*a(n-27) -1366560*a(n-28) -172800*a(n-30) +172800*a(n-31).
EXAMPLE
Some solutions for n=4
..0..3..0..0....0..2..1..3....3..2..1..3....0..1..2..0....3..0..3..3
..0..1..2..3....3..1..2..3....0..1..2..0....0..2..1..3....3..1..2..3
..3..2..1..0....0..3..0..0....3..3..0..0....3..3..0..0....0..2..1..0
..0..0..3..3....3..2..1..3....0..2..1..3....3..1..2..3....3..0..3..3
..0..1..2..0....0..1..2..0....3..1..2..3....0..2..1..0....3..1..2..0
..3..2..1..0....0..3..0..3....0..3..3..0....3..3..0..3....0..2..1..3
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin, Dec 08 2014
STATUS
approved