OFFSET
1,2
COMMENTS
Column 3 of A221308
LINKS
R. H. Hardin, Table of n, a(n) for n = 1..210
FORMULA
Empirical: a(n) = 33*a(n-2) -2*a(n-4) -1074*a(n-6) -4389*a(n-8) -8373*a(n-10) -9016*a(n-12) -5198*a(n-14) -28*a(n-16) +3296*a(n-18) +3856*a(n-20) +2610*a(n-22) +1148*a(n-24) +302*a(n-26) +8*a(n-28) -28*a(n-30) -8*a(n-32) for n>34
EXAMPLE
Some solutions for n=4
..0..2..2....0..0..2....0..2..2....2..2..0....0..2..0....0..2..0....0..2..2
..0..0..0....2..2..0....0..2..0....0..2..0....0..2..0....2..2..0....0..2..2
..2..2..0....2..0..2....0..2..2....2..2..2....0..2..0....0..2..0....0..2..0
..0..2..2....0..2..0....2..0..0....0..0..0....2..2..2....2..2..0....0..2..0
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin Jan 09 2013
STATUS
approved