OFFSET
1,1
COMMENTS
Column 5 of A218319
LINKS
R. H. Hardin, Table of n, a(n) for n = 1..112
FORMULA
Empirical: a(n) = 28*a(n-1) +112*a(n-2) +445*a(n-3) +1828*a(n-4) +8080*a(n-5) -402*a(n-6) -1452*a(n-7) -1206*a(n-9) -7956*a(n-10) +675*a(n-12) +2025*a(n-15)
EXAMPLE
Some solutions for n=3
..0..1..1..1..0....1..1..1..1..0....1..0..0..1..1....0..0..0..1..0
..0..0..1..0..0....0..1..1..0..0....0..0..0..1..1....1..0..0..0..1
..1..0..0..1..0....1..0..0..1..1....0..1..0..1..1....0..1..0..1..0
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin Oct 25 2012
STATUS
approved