OFFSET
1,1
COMMENTS
Column 2 of A262240.
LINKS
R. H. Hardin, Table of n, a(n) for n = 1..210
FORMULA
Empirical: a(n) = 3*a(n-1) -a(n-2) +3*a(n-3) -a(n-4) +3*a(n-5) -a(n-6) +3*a(n-7) -a(n-8) +3*a(n-9) +706*a(n-10) -2118*a(n-11) +706*a(n-12) -2118*a(n-13) +706*a(n-14) -2118*a(n-15) +706*a(n-16) -2118*a(n-17) +706*a(n-18) -2118*a(n-19) -15709*a(n-20) +47127*a(n-21) -15709*a(n-22) +47127*a(n-23) -15709*a(n-24) +47127*a(n-25) -15709*a(n-26) +47127*a(n-27) -15709*a(n-28) +47127*a(n-29)
EXAMPLE
Some solutions for n=5
..0..1..0..1..1....0..1..0..1..1....0..0..0..0..0....0..1..0..1..1
..0..1..0..1..1....0..0..0..0..0....0..0..0..0..0....1..0..1..1..0
..0..0..0..0..0....0..1..0..1..1....0..1..0..1..1....0..1..0..1..1
..0..1..0..1..1....0..0..0..0..0....0..1..0..1..1....1..0..1..1..0
..0..1..0..1..1....0..0..0..0..0....0..0..0..0..0....1..0..1..1..0
..0..1..0..1..1....0..1..0..1..1....0..1..0..1..1....0..1..0..1..1
..0..0..0..0..0....0..0..0..0..0....0..1..0..1..1....0..0..0..0..0
..0..0..0..0..0....0..1..0..1..1....0..1..0..1..1....0..1..0..1..1
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin, Sep 15 2015
STATUS
approved