[seqfan] Mathoverflow discussion about A007018 a(n) = a(n-1)^2 + a(n-1), a(0)=1 and an open problem

[Georgi Guninski]

A question on Mathoverflow:
http://mathoverflow.net/questions/118050/is-oeis-a007018-really-a-subsequence-of-squarefree-numbers

asks if this comment is correct:
A007018 a(n) = a(n-1)^2 + a(n-1), a(0)=1

>Subsequence of squarefree numbers (A005117). - Reinhard Zumkeller, Nov 15 2004

If the comment is correct, it might solve an open problem
about squarefree values of polynomials.