OFFSET
1,1
COMMENTS
Column 6 of A218663
LINKS
R. H. Hardin, Table of n, a(n) for n = 1..207
FORMULA
Empirical: a(n) = 44*a(n-1) +867*a(n-2) +16044*a(n-3) +52184*a(n-4) +219408*a(n-5) -2896552*a(n-6) +917568*a(n-7) -25421202*a(n-8) +135406584*a(n-9) -107845290*a(n-10) +627256872*a(n-11) -2093643936*a(n-12) +1109711664*a(n-13) -4042730304*a(n-14) +9244418112*a(n-15) +947037339*a(n-16) +1414420380*a(n-17) -4269096657*a(n-18) -173831508*a(n-19) -21695040*a(n-20) +555393024*a(n-21)
EXAMPLE
Some solutions for n=3
..0..1..0..1..0..1....0..1..0..1..0..1....0..1..0..0..1..1....0..1..1..1..1..0
..0..0..0..1..1..1....1..1..0..0..0..1....1..0..0..0..0..0....1..0..0..1..1..1
..1..1..0..0..0..1....0..1..0..1..0..1....1..0..1..0..0..1....1..1..0..1..1..1
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin Nov 04 2012
STATUS
approved