OFFSET
1,1
COMMENTS
Column 7 of A268995.
LINKS
R. H. Hardin, Table of n, a(n) for n = 1..210
FORMULA
Empirical: a(n) = 68*a(n-1) -1804*a(n-2) +24560*a(n-3) -195400*a(n-4) +974752*a(n-5) -3171360*a(n-6) +6871936*a(n-7) -9999248*a(n-8) +9740096*a(n-9) -6250176*a(n-10) +2552576*a(n-11) -621824*a(n-12) +79872*a(n-13) -4096*a(n-14) for n>16
EXAMPLE
Some solutions for n=3
..0..0..0..1..0..0..0. .0..0..1..0..0..0..1. .1..0..0..0..1..0..1
..0..0..0..0..0..0..0. .1..0..0..0..1..0..1. .0..0..1..0..0..0..0
..0..1..1..0..1..0..0. .0..0..0..0..0..0..0. .1..0..0..0..1..0..0
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin, Feb 17 2016
STATUS
approved