a question about A134865
Max Alekseyev
maxale at gmail.com
Tue May 20 21:05:38 CEST 2008
On Tue, May 20, 2008 at 6:15 AM, David W. Wilson <wilson.d at anseri.com> wrote:
>> It is strange that A005179 is not referred to in the description of
>> A134865.
>> Each element of A134865 is an element of A005179 (i.e., the terms of
>> A134865 form a subset of the terms of A005179), and the definition can
>> be stated simply as: n is in A134865 iff for every divisor d of n,
>> A134865(A000005(d)) (= A140635(d)) is also a divisor of n.
>
> I assume you meant A005179(A000005(n)), so more succinctly
>
> %N A134865 d | n => A005179(A000005(n)) | n
Sure, sorry for the typo. But in the above line there is also a typo,
it should be:
d | n => A005179(A000005(d)) | n
> However, I'm not sure I recommend this change, since this sequence should
> be found by looking up "divisors" and other such words.
I did not mean to replace the current definition. But A005179
definitely has to be mentioned somewhere in the A134865 entry.
Regards,
Max
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