OFFSET
1,2
COMMENTS
Row 3 of A280398.
LINKS
R. H. Hardin, Table of n, a(n) for n = 1..210
FORMULA
Empirical: a(n) = 7*a(n-1) -13*a(n-2) -13*a(n-3) +69*a(n-4) -51*a(n-5) -79*a(n-6) +121*a(n-7) +8*a(n-8) -24*a(n-9) -80*a(n-10) -24*a(n-11) +176*a(n-12) -32*a(n-13) -80*a(n-14) -48*a(n-15) +64*a(n-17) for n>19
EXAMPLE
Some solutions for n=4
..0..0..1..1. .0..0..0..1. .0..0..1..1. .0..0..0..1. .0..0..1..1
..0..0..2..2. .1..0..1..1. .0..1..2..2. .0..0..0..1. .0..1..2..2
..0..2..2..2. .0..1..1..1. .1..2..2..0. .0..0..1..1. .2..2..2..2
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin, Jan 02 2017
STATUS
approved