[seqfan] Re: Unitary RMPN

[Jack Brennen]

Somebody can also extend it.  :)

The next unknown term is now known.

The smallest solution to USigma(x)/x == 22/21 is for:

   x = 8107610881081625211441398582431641600000

   2^15 * 3^11 * 5^5 * 7^2 * 17^2 * 29^3 * 67 * 271 * 331^2 * 521 * 661 * 1889

My search had an arbitrary limit at 10^40; at 40 digits, this number barely
made it under the limit.




On 1/30/2014 5:57 AM, Neil Sloane wrote:
> Will you please make the necessary corrections to A145680? Thanks! Neil
>
>
> On Thu, Jan 30, 2014 at 3:13 AM, <hv at crypt.org> wrote:
>
>> Ah, I foolishly didn't check if the sequence was already in OEIS.
>>
>> Note that the listed value for a(13) in A145680 is wrong: it is listed
>> as 10904662262592000, but I believe it should be 10584000.
>>
>> The other listed values are confirmed by Jack Brennen's results.
>>
>> Hugo
>>
>> "M. F. Hasler" <seqfan at hasler.fr> wrote:
>> :> Indeed the first two 11/10-URMPN are : 5292000,650916000.
>> :>
>> :
>> :PS: you already found the smallest one in 2009 : see
>> :A145680<https://oeis.org/A145680>!
>> :
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>
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