OFFSET
1,2
COMMENTS
Column 5 of A297431.
LINKS
R. H. Hardin, Table of n, a(n) for n = 1..210
FORMULA
Empirical: a(n) = 2*a(n-1) +2*a(n-2) +24*a(n-3) -22*a(n-4) -40*a(n-5) -163*a(n-6) -40*a(n-7) +76*a(n-8) +246*a(n-9) +160*a(n-10) -57*a(n-11) -115*a(n-12) -50*a(n-13) +18*a(n-14) +12*a(n-15) -33*a(n-16) +4*a(n-17) +5*a(n-18) +7*a(n-19) -3*a(n-20)
EXAMPLE
Some solutions for n=5
..0..1..1..0..0. .0..0..1..1..0. .0..0..1..1..0. .0..0..1..0..0
..0..1..1..0..0. .0..1..0..0..1. .0..1..0..0..1. .0..1..1..1..0
..0..0..0..0..0. .1..0..0..1..0. .1..1..0..1..0. .0..0..0..0..0
..1..1..1..0..0. .0..1..0..1..1. .1..0..0..0..1. .0..0..0..1..0
..0..1..0..0..0. .0..0..1..0..0. .0..1..1..1..0. .0..0..1..1..1
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin, Dec 30 2017
STATUS
approved