OFFSET
1,1
COMMENTS
Column 4 of A260207
LINKS
R. H. Hardin, Table of n, a(n) for n = 1..210
FORMULA
Empirical: a(n) = a(n-1) +2*a(n-2) +18*a(n-3) +17*a(n-4) +7*a(n-5) -40*a(n-6) -78*a(n-7) -21*a(n-8) +88*a(n-9) +62*a(n-10) -49*a(n-11) -24*a(n-12) +9*a(n-13) -18*a(n-14) +2*a(n-15) +9*a(n-16) +4*a(n-17) +4*a(n-18) for n>19
EXAMPLE
Some solutions for n=4
..0..0..0..0..0..0....0..0..0..0..0..0....0..1..0..0..0..0....1..0..0..1..0..0
..0..1..0..0..0..0....0..0..0..1..0..0....0..0..0..0..0..0....0..0..0..0..0..0
..0..0..0..0..0..0....1..0..0..0..0..0....0..0..0..0..0..1....0..0..0..0..0..0
..0..0..0..0..0..0....0..0..0..0..0..0....0..0..1..0..0..0....0..0..0..0..0..0
..0..0..0..0..0..1....0..0..0..0..0..1....0..0..0..0..0..0....0..0..0..0..0..0
..0..0..0..0..0..0....0..1..0..0..0..0....0..0..0..0..0..0....0..1..0..0..1..0
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin, Jul 19 2015
STATUS
approved