OFFSET
1,1
COMMENTS
Column 4 of A206883.
LINKS
R. H. Hardin, Table of n, a(n) for n = 1..210
FORMULA
Empirical: a(n) = 8*a(n-1) -18*a(n-2) +69*a(n-3) +92*a(n-4) -189*a(n-5) +404*a(n-6) -187*a(n-7) -4014*a(n-8) -682*a(n-9) +9084*a(n-10) +5101*a(n-11) -6052*a(n-12) -5594*a(n-13) -1393*a(n-14) -277*a(n-15) +1312*a(n-16) +1153*a(n-17) +533*a(n-18) +112*a(n-19) -87*a(n-20) -46*a(n-21) -32*a(n-22) -9*a(n-23) +3*a(n-24) +a(n-25).
EXAMPLE
Some solutions for n=4
..0..0..1..1....0..1..1..0....0..1..1..0....1..0..0..1....1..0..0..0
..1..1..0..1....0..1..1..1....0..1..1..1....1..1..0..0....0..1..1..0
..1..0..0..0....1..0..0..1....0..1..1..1....1..0..0..0....0..0..1..1
..0..0..0..0....1..0..0..0....1..0..1..1....1..0..0..1....1..0..1..1
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin, Feb 13 2012
STATUS
approved