OFFSET
1,1
COMMENTS
Column 3 of A231523
LINKS
R. H. Hardin, Table of n, a(n) for n = 1..210
FORMULA
Empirical: a(n) = 4*a(n-1) -2*a(n-2) +43*a(n-3) -50*a(n-4) +33*a(n-5) -307*a(n-6) +115*a(n-7) -66*a(n-8) +490*a(n-9) +60*a(n-10) -144*a(n-11) +32*a(n-12) -192*a(n-13) for n>14
EXAMPLE
Some solutions for n=7
..0..1..0....0..0..1....1..0..1....0..0..1....1..0..0....1..0..0....1..0..0
..1..0..0....0..1..1....0..0..0....0..0..1....0..0..0....1..1..0....0..1..1
..1..0..0....0..0..0....1..0..0....0..0..0....1..1..0....1..0..0....1..0..0
..0..0..0....0..0..1....1..0..0....1..0..0....0..0..1....0..0..1....0..0..1
..0..0..0....1..0..0....0..0..0....0..0..1....0..0..0....0..0..0....1..1..0
..0..0..0....0..0..0....0..0..1....0..0..0....0..0..1....1..0..0....1..0..0
..0..0..1....0..1..0....1..0..0....1..1..1....1..1..1....0..0..1....0..0..0
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin, Nov 10 2013
STATUS
approved