[seqfan] R: On the divisibility of a certain linear recurrence

[Mason John]

a(3)=3*a(2) + 8*a(1) = 3*3 + 8*1 = 17, right? Why 9?
john

-----Messaggio originale-----
Da: SeqFan <seqfan-bounces at list.seqfan.eu> Per conto di Peter Luschny
Inviato: martedì 8 gennaio 2019 10:30
A: seqfan at list.seqfan.eu
Oggetto: [seqfan] On the divisibility of a certain linear recurrence

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

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