OFFSET
1,1
COMMENTS
Column 4 of A296674.
LINKS
R. H. Hardin, Table of n, a(n) for n = 1..210
FORMULA
Empirical: a(n) = 7*a(n-1) +7*a(n-2) +5*a(n-3) -357*a(n-4) -256*a(n-5) +1029*a(n-6) +2658*a(n-7) +3925*a(n-8) -1538*a(n-9) -9402*a(n-10) -16653*a(n-11) -1906*a(n-12) +11571*a(n-13) +44254*a(n-14) +42564*a(n-15) -8544*a(n-16) -40891*a(n-17) -36046*a(n-18) -5947*a(n-19) +19697*a(n-20) -21657*a(n-21) +3238*a(n-22) -1153*a(n-23) +1222*a(n-24) -974*a(n-25) +264*a(n-26) -32*a(n-27)
EXAMPLE
Some solutions for n=6
..0..1..0..1. .0..0..1..1. .1..1..0..0. .1..1..0..0. .0..0..0..0
..0..0..0..0. .0..0..1..0. .1..0..1..0. .0..1..0..0. .0..1..1..1
..0..0..0..1. .0..1..0..0. .0..1..0..0. .1..0..0..0. .1..0..0..1
..0..1..0..0. .0..1..1..0. .0..0..0..1. .1..0..1..0. .0..1..0..1
..0..0..0..1. .1..0..0..0. .0..0..0..0. .0..1..1..0. .1..0..0..1
..1..0..0..0. .1..1..0..1. .1..0..0..1. .0..0..0..0. .1..1..1..0
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin, Dec 18 2017
STATUS
approved