OFFSET
1,2
COMMENTS
Column 3 of A280284.
LINKS
R. H. Hardin, Table of n, a(n) for n = 1..210
FORMULA
Empirical: a(n) = 20*a(n-1) -48*a(n-2) -636*a(n-3) +286*a(n-4) +4870*a(n-5) +2994*a(n-6) -7250*a(n-7) -20395*a(n-8) -27254*a(n-9) +18145*a(n-10) +42436*a(n-11) +25187*a(n-12) +8976*a(n-13) -53063*a(n-14) +3942*a(n-15) +11087*a(n-16) -3576*a(n-17) +616*a(n-18) -6944*a(n-19) -48*a(n-20) +512*a(n-21) -384*a(n-22) -256*a(n-24) for n>25.
EXAMPLE
Some solutions for n=4
..0..1..2. .0..1..1. .0..0..1. .0..1..2. .0..1..2. .0..1..1. .0..1..0
..2..2..0. .1..2..0. .1..1..0. .1..0..1. .0..1..0. .1..2..0. .1..2..0
..0..0..1. .0..1..0. .1..0..2. .0..0..2. .1..2..2. .2..2..2. .0..1..0
..1..0..2. .0..0..1. .2..1..2. .2..1..1. .1..1..0. .1..1..0. .1..0..1
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin, Dec 30 2016
STATUS
approved