OFFSET
1,1
COMMENTS
Column 4 of A205440
LINKS
R. H. Hardin, Table of n, a(n) for n = 1..210
FORMULA
Empirical: a(n) = 205*a(n-1) -15946*a(n-2) +645187*a(n-3) -14769309*a(n-4) +175596488*a(n-5) -232992337*a(n-6) -24636432999*a(n-7) +350104743368*a(n-8) -1468588821199*a(n-9) -13317298254056*a(n-10) +205721543579687*a(n-11) -873716539544192*a(n-12) -2499100023238467*a(n-13) +42640653491442386*a(n-14) -150750136168186581*a(n-15) -246907196851253659*a(n-16) +3715844179216610168*a(n-17) -9826625905878597494*a(n-18) -13726868697726497146*a(n-19) +140340542694532520657*a(n-20) -252417500777430187913*a(n-21) -388827521776141928169*a(n-22) +2291771342365998745448*a(n-23) -2482348100905799204036*a(n-24) -4940770376631827613098*a(n-25) +15884680325575347756896*a(n-26) -8578088759200323084764*a(n-27) -25026367106537227114972*a(n-28) +44031310453030859809080*a(n-29) -7100384520093283536336*a(n-30) -47090139384636129778368*a(n-31) +46061763741343104578112*a(n-32) +1653723823133117045376*a(n-33) -28843859749067258897664*a(n-34) +17274323156979810318336*a(n-35) -99068763098589401088*a(n-36) -4056314237368096260096*a(n-37) +1872904635104744521728*a(n-38) -357610284205192249344*a(n-39) +25574132729209946112*a(n-40)
EXAMPLE
Some solutions for n=4
..0..1..0..1..0....0..0..0..0..0....0..0..0..0..1....0..1..1..0..2
..0..0..0..0..0....0..1..0..1..0....0..1..0..1..1....1..1..0..0..2
..3..0..2..0..2....1..1..1..1..0....0..0..0..0..1....1..0..0..2..2
..3..0..0..0..0....1..2..1..0..0....0..3..3..0..1....0..0..2..2..0
..3..3..3..3..3....1..1..1..0..1....3..3..0..0..0....3..0..2..0..0
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin Jan 27 2012
STATUS
approved