OFFSET
1,1
COMMENTS
Column 3 of A231544
LINKS
R. H. Hardin, Table of n, a(n) for n = 1..210
FORMULA
Empirical: a(n) = 7*a(n-1) -14*a(n-2) +34*a(n-3) -67*a(n-4) +86*a(n-5) -79*a(n-6) +14*a(n-7) +47*a(n-8) -66*a(n-9) +15*a(n-10) -105*a(n-11) +121*a(n-12) +24*a(n-13) -40*a(n-14) -56*a(n-15) +2*a(n-16) +43*a(n-17) -11*a(n-18) -15*a(n-19) -6*a(n-20) +2*a(n-21) +a(n-22)
EXAMPLE
Some solutions for n=7
..1..0..0....1..1..0....1..1..1....1..0..0....0..0..0....1..0..1....1..0..0
..0..1..0....1..0..0....1..0..0....1..0..0....0..0..0....0..0..1....1..0..0
..0..0..0....0..0..1....0..0..0....0..1..1....0..0..1....1..0..0....0..0..1
..1..0..1....0..0..0....1..0..1....0..0..0....1..0..0....0..1..0....0..0..0
..0..1..0....0..0..0....0..0..0....0..0..1....0..0..1....0..0..0....0..0..0
..0..0..0....0..1..0....0..0..0....0..1..0....0..0..1....0..0..0....0..0..0
..0..1..1....1..0..0....1..1..0....0..0..0....0..0..0....1..1..1....1..0..0
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin, Nov 10 2013
STATUS
approved