OFFSET
1,1
COMMENTS
Column 7 of A253367
LINKS
R. H. Hardin, Table of n, a(n) for n = 1..210
FORMULA
Empirical: a(n) = 21*a(n-2) -198*a(n-4) +1114*a(n-6) -3665*a(n-8) +12265*a(n-10) -37276*a(n-12) +60072*a(n-14) -35500*a(n-16) -80480*a(n-18) +44160*a(n-20) +26752*a(n-22) -18496*a(n-24) +12352*a(n-26) +960*a(n-28) -2048*a(n-30) for n>33
EXAMPLE
Some solutions for n=4
..0..0..0..1..0..1..1..1..1....1..0..0..0..0..0..0..0..0
..1..0..1..0..1..0..1..0..1....0..0..0..1..0..1..0..1..0
..0..1..1..1..1..1..1..1..0....1..0..1..0..1..0..0..0..0
..1..0..1..0..1..0..1..0..1....0..0..0..0..0..0..0..1..0
..1..1..1..1..0..1..0..1..0....1..0..1..0..1..0..1..0..1
..1..0..1..1..1..1..1..1..1....1..0..0..0..0..0..0..1..0
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin, Dec 30 2014
STATUS
approved