OFFSET
1,1
COMMENTS
Column 3 of A253326
LINKS
R. H. Hardin, Table of n, a(n) for n = 1..210
FORMULA
Empirical: a(n) = 4*a(n-1) +2*a(n-2) -26*a(n-3) +16*a(n-4) +62*a(n-5) -70*a(n-6) -62*a(n-7) +109*a(n-8) +14*a(n-9) -76*a(n-10) +16*a(n-11) +20*a(n-12) -8*a(n-13) for n>15
EXAMPLE
Some solutions for n=4
..0..0..0..1....0..0..0..0....0..0..0..1....0..0..0..1....0..0..1..0
..0..0..0..0....0..0..0..0....0..1..0..1....0..1..0..0....0..0..0..0
..0..0..1..0....0..0..0..0....1..0..1..1....0..0..0..1....1..1..1..1
..1..0..1..0....1..0..1..1....1..1..1..1....1..0..1..1....1..1..1..1
..1..1..1..1....1..0..1..1....0..1..1..1....0..1..1..0....1..1..1..1
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin, Dec 30 2014
STATUS
approved