OFFSET
1,1
FORMULA
a(n) == 2 (mod 60) for n>=1 (conjecture).
EXAMPLE
L.g.f.: L(x) = 2*x + 62*x^2/2 + 7862*x^3/3 + 2727962*x^4/4 + 2142727322*x^5/5 + 3338786909702*x^6/6 +...
such that
exp(L(x)) = 1 + 2*x + 33*x^2 + 2684*x^3 + 687775*x^4 + 429996930*x^5 + 557347687435*x^6 +...+ x^n/n!*Product_{k=1..n} (k^5 + 1) +...
PROG
(PARI) {a(n) = n*polcoeff( log(sum(m=0, n+1, x^m/m!*prod(k=1, m, k^5+1)) +x*O(x^n)), n)}
for(n=1, 30, print1(a(n), ", "))
CROSSREFS
KEYWORD
nonn
AUTHOR
Paul D. Hanna, Sep 08 2015
STATUS
approved