OFFSET
1,1
COMMENTS
Column 7 of A261292.
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) -504*a(n-8) -183*a(n-10) +2017*a(n-12) -433*a(n-14) -4301*a(n-16) +4487*a(n-18) -20226*a(n-20) +67671*a(n-22) -85069*a(n-24) +15742*a(n-26) +113631*a(n-28) -145965*a(n-30) -77933*a(n-32) +581282*a(n-34) -888710*a(n-36) +370130*a(n-38) +202679*a(n-40) -271169*a(n-42) +90087*a(n-44) +41519*a(n-46) -19825*a(n-48) +1820*a(n-50) +70*a(n-52) -892*a(n-54) -416*a(n-56) -64*a(n-58) for n>69
EXAMPLE
Some solutions for n=4
..0..0..1..0..0..0..1..0..0....0..0..1..0..1..0..0..0..0
..0..1..0..1..0..1..0..0..0....0..1..0..0..0..1..0..1..0
..1..0..1..0..1..0..1..0..1....1..0..1..0..1..0..1..0..0
..0..1..0..1..0..1..0..1..0....0..1..0..1..0..1..0..1..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, Aug 14 2015
STATUS
approved