OFFSET
1,1
COMMENTS
Column 2 of A204962
LINKS
R. H. Hardin, Table of n, a(n) for n = 1..210
FORMULA
Empirical: a(n) = 7*a(n-1) +6*a(n-2) -121*a(n-3) +60*a(n-4) +899*a(n-5) -794*a(n-6) -3741*a(n-7) +3822*a(n-8) +9513*a(n-9) -10198*a(n-10) -15151*a(n-11) +16736*a(n-12) +14873*a(n-13) -17358*a(n-14) -8327*a(n-15) +11131*a(n-16) +1988*a(n-17) -4040*a(n-18) +204*a(n-19) +636*a(n-20) -144*a(n-21)
EXAMPLE
Some solutions for n=4
..1..1..1....0..0..1....1..0..0....1..1..1....0..0..0....1..0..0....0..1..0
..0..1..0....0..0..0....0..0..1....1..1..1....1..0..1....1..0..1....0..0..1
..1..0..1....1..0..1....1..0..1....1..1..1....0..0..0....1..0..1....1..1..1
..1..1..1....1..0..0....0..1..1....1..1..1....0..1..1....1..0..1....0..1..0
..1..0..1....1..0..0....1..1..1....1..1..1....0..1..0....0..0..1....1..1..1
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin Jan 20 2012
STATUS
approved