OFFSET
1,2
COMMENTS
FORMULA
Logarithmic derivative of A224608.
EXAMPLE
L.g.f.: L(x) = x + 5*x^2/2 + 28*x^3/3 + 269*x^4/4 + 6181*x^5/5 + 286790*x^6/6 +...
where
exp(L(x)) = 1 + x + 3*x^2 + 12*x^3 + 81*x^4 + 1335*x^5 + 49309*x^6 + 3882180*x^7 +...+ A224608(n)*x^n +...
PROG
(PARI) {a(n)=n^2*polcoeff(-log(1-sum(r=1, n, x^(r^2)+x*O(x^(n^2)))), n^2)}
for(n=1, 30, print1(a(n), ", "))
CROSSREFS
KEYWORD
nonn
AUTHOR
Paul D. Hanna, Apr 12 2013
STATUS
approved