OFFSET
0,2
COMMENTS
This is sequence a_n(5) in Table 3 of Hikami 2003.
LINKS
K. Hikami, Volume Conjecture and Asymptotic Expansion of q-Series, Experimental Mathematics Vol. 12, Issue 3 (2003).
FORMULA
Define F(q) := sum {m,n >= 0} (q^(-m*n)*product {i = 1.. m+n} (1-q^i)).O.g.f.: F(1-q) = 1 + 2*q + 6*q^2 + 23*q^3 + ....
For n >=1, a(n) = 1/n!*sum {k = 1..n} |Stirling1(n,k)|*A208730(k).
CROSSREFS
KEYWORD
nonn,easy
AUTHOR
Peter Bala, Mar 02 2012
STATUS
approved