[seqfan] On the divisibility of a certain linear recurrence

[Peter Luschny]

Consider the linear recurrence

    a(n) = 3*a(n-1) + 8*a(n-2) starting 1, 3, 9, ...

Is it true that p prime and p not 2 or 5 implies
that a(p) is squarefree?

Peter