OFFSET
1,1
COMMENTS
Column 5 of A208201
LINKS
R. H. Hardin, Table of n, a(n) for n = 1..210
FORMULA
Empirical: a(n) = 928*a(n-1) +38247*a(n-2) -1419908*a(n-3) -25003347*a(n-4) +1012531896*a(n-5) -9450054156*a(n-6) +24082844974*a(n-7) +80821917709*a(n-8) -489140400628*a(n-9) +403243304428*a(n-10) +1648713698424*a(n-11) -3331507779798*a(n-12) +632406681414*a(n-13) +2327643475767*a(n-14) -977046212844*a(n-15) -462110735853*a(n-16) +172474098336*a(n-17) +29511981612*a(n-18) -7270112880*a(n-19) for n>20
EXAMPLE
Some solutions for n=4
..0..0..0..1..0....0..0..0..0..0....0..1..0..0..0....0..1..1..0..0
..0..1..1..0..2....0..1..0..2..0....1..0..0..1..0....0..2..0..0..2
..2..1..2..2..2....1..0..2..0..1....1..0..2..3..1....1..1..3..1..0
..0..1..3..1..3....2..1..3..0..0....3..2..2..1..1....0..1..0..2..3
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin Feb 24 2012
STATUS
approved