OFFSET
1,1
COMMENTS
Column 5 of A236997
LINKS
R. H. Hardin, Table of n, a(n) for n = 1..210
FORMULA
Empirical: a(n) = 1115200*a(n-4) -430632960000*a(n-8) +66962587648000000*a(n-12) -3428940827852800000000*a(n-16)
EXAMPLE
Some solutions for n=1
..2..0..1..0..0..2....2..2..0..2..2..1....0..1..0..2..2..1....1..1..0..0..1..1
..0..2..0..1..0..2....0..1..1..0..0..0....1..2..0..2..1..2....0..1..0..1..2..1
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin, Feb 02 2014
STATUS
approved