OFFSET
1,1
COMMENTS
Column 4 of A296335.
LINKS
R. H. Hardin, Table of n, a(n) for n = 1..210
FORMULA
Empirical: a(n) = 4*a(n-1) +4*a(n-2) +16*a(n-3) -4*a(n-4) -14*a(n-5) -72*a(n-6) -54*a(n-7) -102*a(n-8) +15*a(n-9) -113*a(n-10) +86*a(n-11) -184*a(n-12) +203*a(n-13) -255*a(n-14) +221*a(n-15) -177*a(n-16) +106*a(n-17) -55*a(n-18) +21*a(n-19) -6*a(n-20) +a(n-21)
EXAMPLE
Some solutions for n=5
..0..1..0..1. .0..1..0..1. .0..0..1..1. .1..0..0..1. .0..0..0..1
..0..0..0..0. .0..0..0..0. .1..0..1..0. .0..0..0..0. .1..0..0..0
..1..1..0..1. .0..0..0..0. .0..0..0..0. .0..0..0..0. .0..0..0..0
..1..0..1..1. .0..1..0..0. .1..0..1..0. .1..1..0..0. .0..1..0..0
..0..0..0..0. .1..1..0..1. .0..1..1..0. .1..0..0..0. .0..0..0..0
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin, Dec 10 2017
STATUS
approved