OFFSET
1,2
COMMENTS
Column 2 of A220319
LINKS
R. H. Hardin, Table of n, a(n) for n = 1..210
FORMULA
Empirical: a(n) = 4*a(n-1) +6*a(n-2) -22*a(n-3) -15*a(n-4) +10*a(n-5) +56*a(n-6) +46*a(n-7) -112*a(n-8) -84*a(n-9) -67*a(n-10) +358*a(n-11) +277*a(n-12) -168*a(n-13) -638*a(n-14) -162*a(n-15) +664*a(n-16) +408*a(n-17) +180*a(n-18) -8*a(n-19) +76*a(n-20) -264*a(n-21) +96*a(n-22)
EXAMPLE
Some solutions for n=3
..0..0....0..1....0..0....0..1....0..1....1..1....1..1....1..0....1..0....1..0
..0..1....0..0....1..1....1..1....0..0....0..0....1..1....0..0....1..1....0..0
..1..1....1..0....0..0....0..0....0..1....1..1....1..1....0..0....0..0....0..1
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin Dec 10 2012
STATUS
approved