OFFSET
1,1
COMMENTS
Column 4 of A303469.
LINKS
R. H. Hardin, Table of n, a(n) for n = 1..210
FORMULA
Empirical: a(n) = 12*a(n-1) -15*a(n-2) +6*a(n-3) -854*a(n-4) +1079*a(n-5) +2906*a(n-6) +9224*a(n-7) -20608*a(n-8) -22133*a(n-9) -8708*a(n-10) +56172*a(n-11) -22130*a(n-12) -37398*a(n-13) +204184*a(n-14) -19940*a(n-15) +45128*a(n-16) -220512*a(n-17) +7920*a(n-18) -23328*a(n-19) +46656*a(n-20) for n>21
EXAMPLE
Some solutions for n=5
..0..0..0..1. .0..0..0..1. .0..1..0..0. .0..1..0..0. .0..0..1..1
..1..1..0..0. .0..1..1..1. .1..1..1..0. .0..0..1..0. .1..1..0..1
..0..1..0..1. .0..1..0..1. .0..0..1..0. .1..0..1..1. .1..1..0..0
..1..0..0..0. .0..1..0..1. .0..1..0..1. .0..0..1..0. .0..1..0..1
..0..1..0..1. .1..0..1..1. .0..1..0..1. .0..0..1..0. .1..0..0..1
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin, Apr 24 2018
STATUS
approved