OFFSET
1,1
COMMENTS
Column 5 of A217982
LINKS
R. H. Hardin, Table of n, a(n) for n = 1..53
FORMULA
Empirical: a(n) = 3*a(n-1) +10*a(n-2) +a(n-3) -28*a(n-4) -58*a(n-5) +41*a(n-6) +39*a(n-7) -50*a(n-8) -9*a(n-9) +100*a(n-10) +368*a(n-11) -439*a(n-12) -51*a(n-13) +370*a(n-14) -249*a(n-15) -56*a(n-16) +106*a(n-17) -33*a(n-18) -7*a(n-19) +6*a(n-20) +a(n-21)
EXAMPLE
Some solutions for n=3
..1..1..1..0..0....1..1..0..0..0....1..1..0..0..0....1..0..0..0..0
..0..0..1..0..0....1..0..0..0..0....1..0..0..0..0....1..0..0..0..0
..0..0..1..1..1....1..0..0..0..0....1..0..0..0..1....1..1..1..1..1
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin Oct 16 2012
STATUS
approved