OFFSET
1,1
COMMENTS
Column 4 of A207426
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) -21*a(n-4) -46*a(n-5) -6*a(n-6) +35*a(n-7) +49*a(n-8) +19*a(n-9) -16*a(n-10) -21*a(n-11) -4*a(n-13) -2*a(n-14) +a(n-15)
EXAMPLE
Some solutions for n=4
..1..0..0..1....1..0..1..1....1..0..1..1....0..1..1..1....1..0..0..1
..0..1..1..0....0..0..1..1....0..1..1..1....1..0..0..1....1..0..1..1
..1..1..1..1....1..0..1..1....0..1..1..1....1..0..0..1....0..0..1..1
..1..1..1..1....1..0..0..1....0..0..1..1....1..0..0..1....1..0..0..1
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin Feb 17 2012
STATUS
approved