OFFSET
1,1
COMMENTS
Column 4 of A219403
LINKS
R. H. Hardin, Table of n, a(n) for n = 1..75
FORMULA
Empirical: a(n) = 5*a(n-1) -7*a(n-2) +8*a(n-3) +19*a(n-4) -19*a(n-5) -17*a(n-6) +26*a(n-7) -13*a(n-8) -41*a(n-9) -11*a(n-10) -14*a(n-11) +18*a(n-12) +45*a(n-13) -11*a(n-14) -36*a(n-15) +8*a(n-16) +17*a(n-17) -5*a(n-18) -5*a(n-19) +2*a(n-20) for n>21
EXAMPLE
Some solutions for n=3
..0..0..0..1....0..0..1..1....1..1..1..1....0..0..0..1....0..0..1..1
..0..0..0..1....0..0..0..1....1..0..0..0....0..0..0..1....0..0..0..0
..1..1..1..1....0..0..0..1....1..0..0..0....0..0..0..1....1..1..0..0
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin Nov 19 2012
STATUS
approved