OFFSET
1,1
COMMENTS
Column 4 of A207808
LINKS
R. H. Hardin, Table of n, a(n) for n = 1..210
FORMULA
Empirical: a(n) = 4*a(n-1) +a(n-2) -8*a(n-3) +53*a(n-4) +166*a(n-5) +347*a(n-6) +208*a(n-7) -166*a(n-8) -780*a(n-9) -2484*a(n-10) -3678*a(n-11) -3721*a(n-12) -644*a(n-13) +1359*a(n-14) +1318*a(n-15) +536*a(n-16) -82*a(n-17) +446*a(n-18) -106*a(n-19) -85*a(n-20) -32*a(n-21) -47*a(n-22) +28*a(n-23) -9*a(n-24) +a(n-26)
EXAMPLE
Some solutions for n=4
..1..0..1..1....1..0..1..0....0..1..1..0....0..1..1..0....1..1..0..0
..0..1..1..0....1..1..0..1....1..1..0..0....1..1..0..0....1..1..1..0
..0..1..0..0....0..1..0..1....1..1..0..0....1..1..0..0....0..1..1..1
..0..1..0..0....0..1..1..1....0..1..1..1....1..1..1..1....0..1..1..1
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin Feb 20 2012
STATUS
approved