[seqfan] Re: UnitaryPhi

[Ami Eldar]

a(12)=64281600 (and I didn't do it mentally...)

On Fri, Aug 31, 2018 at 7:08 AM, <zbi74583_boat at yahoo.co.jp> wrote:

>     Hi Seqfans    See A145680  It is defined as follow
>     The smallest number m such that UnitarySigma(m)=(n+1)/n*m
>     I replaced UniitarySigma by   UnitaryPhi
>     The smallest number m such that UnitaryPhi(m)=(n-1)/n*m
>     a(n) : 2, 3, 4, 5, 144, 7, 8, 9, 400, 11, -, 13, 2^12*3^4*5^2*7^2,
> 2^9*3^4*5^2*73, 16, 17, 2^8*3^4*5^2, 19, -
>     I computed some term   mentally  Could anyone confirm them and compute
> more terms?  Still a(12) is unknown
>
>
>     Yasutoshi
>
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