OFFSET
1,2
COMMENTS
Column 5 of A281400.
LINKS
R. H. Hardin, Table of n, a(n) for n = 1..210
FORMULA
Empirical: a(n) = 3*a(n-1) -a(n-2) +5*a(n-3) -15*a(n-4) -5*a(n-5) -4*a(n-6) +22*a(n-7) +44*a(n-8) -6*a(n-9) -23*a(n-10) -73*a(n-11) -16*a(n-12) +48*a(n-13) +39*a(n-14) +37*a(n-15) -33*a(n-16) -39*a(n-17) +9*a(n-18) +9*a(n-19) for n>30
EXAMPLE
Some solutions for n=4
..0..1..0..0..1. .0..0..1..0..0. .0..0..1..1..0. .0..0..1..1..0
..1..1..0..1..1. .1..0..1..0..1. .1..1..0..0..0. .1..0..1..1..0
..1..0..0..1..0. .1..1..1..0..0. .0..1..0..1..0. .0..0..1..0..1
..0..1..0..1..0. .0..0..0..1..1. .0..1..0..1..0. .0..1..1..0..0
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin, Jan 21 2017
STATUS
approved