OFFSET
1,1
COMMENTS
Column 7 of A259742.
LINKS
R. H. Hardin, Table of n, a(n) for n = 1..210
FORMULA
Empirical: a(n) = 4*a(n-2) +72*a(n-4) +126*a(n-6) -506*a(n-8) -177*a(n-10) +2157*a(n-12) -663*a(n-14) -6554*a(n-16) +8949*a(n-18) -1807*a(n-20) -4122*a(n-22) +1182*a(n-24) +500*a(n-26) +261*a(n-28) +111*a(n-30) -10*a(n-32) +10*a(n-34) for n>37.
EXAMPLE
Some solutions for n=4
..1..0..1..0..1..0..1..0..1....1..0..1..0..1..0..1..0..1
..0..0..0..1..0..1..0..1..0....0..0..0..1..0..1..0..1..0
..1..0..1..0..1..0..1..0..1....1..0..1..0..1..0..1..0..1
..0..1..0..1..0..1..0..0..0....0..1..0..1..0..1..0..0..0
..1..0..0..0..1..0..1..0..1....0..0..1..0..0..0..1..0..1
..0..1..0..1..0..1..0..1..0....0..1..0..1..0..1..0..1..0
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin, Jul 04 2015
STATUS
approved