OFFSET
1,1
COMMENTS
Column 6 of A223585
LINKS
R. H. Hardin, Table of n, a(n) for n = 1..210
FORMULA
Let U(z) = (z^6+15*z^5+115*z^4+405*z^3+964*z^2+660*z+720)/720
a(n) = U(min(n,6))^(max(n,6)-min(n,6)+1) * product{ U(i)^2 , i=1..(min(n,6)-1) }
a(n) = 610*a(n-1) for n>5
EXAMPLE
Some solutions for n=3
..0..0..0..0..0..2....0..0..0..0..1..0....0..0..0..0..0..3....0..0..0..0..0..2
..0..0..0..2..2..1....0..0..0..2..3..2....0..0..0..1..3..3....0..0..0..2..1..0
..0..0..0..0..2..1....0..0..1..1..0..2....0..0..1..1..0..0....0..0..0..0..0..2
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin Mar 22 2013
STATUS
approved