OFFSET
1,1
COMMENTS
Column 4 of A260070
LINKS
R. H. Hardin, Table of n, a(n) for n = 1..210
FORMULA
Empirical: a(n) = 2*a(n-2) +8*a(n-3) +21*a(n-4) -14*a(n-5) -60*a(n-6) -76*a(n-7) -98*a(n-8) +139*a(n-9) +324*a(n-10) +176*a(n-11) +138*a(n-12) -351*a(n-13) -596*a(n-14) -154*a(n-15) +90*a(n-16) +484*a(n-17) +424*a(n-18) +72*a(n-19) -160*a(n-20) -288*a(n-21) for n>25
EXAMPLE
Some solutions for n=4
..0..0..0..0..1..0....1..1..0..0..1..1....0..0..0..0..1..0....0..0..0..0..0..0
..0..1..0..0..1..0....0..0..0..0..1..0....1..1..0..0..1..0....1..1..0..0..1..0
..0..1..0..0..0..0....0..0..0..0..0..0....0..0..0..0..0..0....0..0..0..0..1..0
..0..0..0..0..0..0....1..1..0..0..0..0....0..0..0..0..0..0....0..0..0..0..0..0
..0..0..0..0..1..0....1..0..0..0..1..0....0..0..1..0..0..1....1..1..0..0..0..0
..1..1..0..0..1..1....0..0..0..0..0..1....0..0..1..0..0..0....1..1..0..0..1..1
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin, Jul 14 2015
STATUS
approved