[seqfan] Re: More (composite) terms for A233281
Hans Havermann
gladhobo at teksavvy.com
Mon Feb 3 23:58:22 CET 2014
"Numbers n such that the least Fibonacci number F_k which is a multiple of n has a prime index, i.e. k is in A000040."
For those of us who think 'multiple' means more than one, 'positive multiple' (or an example) might have cleared this up. Anyways, here are some additional values less than 10^8: 75077, 162133, 330929, 1256293, 1346269, 2662277, 3636121, 4226777, 9401893, 13455077, 14787181, 16485493, 21692189, 24157817, 24493061, 25532501, 29604893, 31432381, 39247393, 73780877, 75245777, 77337941.
75077 is the only additional composite < 10^5. In the remaining range, I don't know if there are other solutions.
On Feb 1, 2014, at 9:08 PM, Antti Karttunen <antti.karttunen at gmail.com> wrote:
>> http://oeis.org/A233281 that I recently submitted: "Numbers n such that A001177(n) is prime."
>> So far, only two composites there, 4181 and 10877, are known.
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