OFFSET
1,1
COMMENTS
Column 4 of A205736.
LINKS
R. H. Hardin, Table of n, a(n) for n = 1..210
FORMULA
Empirical: a(n) = 25*a(n-2) -97*a(n-4) -599*a(n-6) +5944*a(n-8) -21030*a(n-10) +40354*a(n-12) -42520*a(n-14) +13229*a(n-16) +28855*a(n-18) -48755*a(n-20) +36487*a(n-22) -13284*a(n-24) -138*a(n-26) +2402*a(n-28) -1064*a(n-30) +208*a(n-32) -16*a(n-34) for n>38.
EXAMPLE
Some solutions for n=4:
..1..2..2..1..1....2..2..1..2..2....2..1..1..2..1....1..1..1..0..0
..1..2..0..0..1....0..2..1..2..0....1..0..2..1..2....2..1..2..2..0
..2..0..2..1..0....2..1..2..0..1....1..1..1..1..1....0..2..1..0..2
..0..0..0..0..0....2..1..2..0..1....1..1..1..1..1....2..2..2..2..2
..0..0..0..0..0....0..2..0..1..2....2..1..2..2..0....2..2..2..2..2
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin, Jan 30 2012
STATUS
approved