OFFSET
11,2
LINKS
R. H. Hardin, Table of n, a(n) for n=11..59
FORMULA
Empirical: a(n)=n*binomial(n+8,n-2) for n>20.
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin, formula from Robert Gerbicz in the Sequence Fans Mailing List, Aug 24 2010
STATUS
approved