OFFSET
1,3
COMMENTS
Column 3 of A284075.
LINKS
R. H. Hardin, Table of n, a(n) for n = 1..210
FORMULA
Empirical: a(n) = 21*a(n-1) -153*a(n-2) +484*a(n-3) -1254*a(n-4) +5199*a(n-5) -10697*a(n-6) +19671*a(n-7) -61194*a(n-8) +93379*a(n-9) -140298*a(n-10) +354402*a(n-11) -436616*a(n-12) +546228*a(n-13) -1123992*a(n-14) +1218808*a(n-15) -1193856*a(n-16) +1907040*a(n-17) -2009856*a(n-18) +1446528*a(n-19) -1456128*a(n-20) +1486336*a(n-21) -890880*a(n-22) +270336*a(n-23) -32768*a(n-24).
EXAMPLE
Some solutions for n=4
..1..1..1. .1..0..0. .0..0..1. .1..0..0. .0..1..0. .1..1..0. .0..0..1
..1..1..1. .0..1..0. .1..1..1. .0..1..1. .1..1..1. .1..0..0. .1..1..1
..0..0..0. .1..1..1. .1..1..1. .1..1..1. .1..1..1. .1..1..1. .1..1..1
..0..0..1. .1..1..1. .0..1..0. .0..1..1. .0..1..1. .1..1..1. .1..0..0
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin, Mar 19 2017
STATUS
approved