OFFSET
1,1
COMMENTS
Column 5 of A280398.
LINKS
R. H. Hardin, Table of n, a(n) for n = 1..210
FORMULA
Empirical: a(n) = 62*a(n-1) -1689*a(n-2) +27708*a(n-3) -317054*a(n-4) +2742180*a(n-5) -18792682*a(n-6) +105117296*a(n-7) -489211669*a(n-8) +1918107326*a(n-9) -6385629933*a(n-10) +18129670212*a(n-11) -43970324140*a(n-12) +91044631344*a(n-13) -160522270160*a(n-14) +239886399040*a(n-15) -301819629440*a(n-16) +316752389376*a(n-17) -273752283136*a(n-18) +191350312960*a(n-19) -105370821632*a(n-20) +43909677056*a(n-21) -12957122560*a(n-22) +2392850432*a(n-23) -205520896*a(n-24) for n>25
EXAMPLE
Some solutions for n=4
..0..0..1..1..1. .0..0..1..1..2. .0..0..1..1..0. .0..0..0..0..0
..1..1..1..2..2. .0..1..1..2..2. .0..1..1..0..0. .1..1..1..1..0
..2..2..2..2..2. .1..2..1..1..2. .0..0..0..1..1. .0..0..0..0..1
..1..1..1..1..1. .1..1..1..2..2. .2..2..1..1..1. .1..1..1..1..1
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin, Jan 02 2017
STATUS
approved