[seqfan] Re: does 148 belong to A094612 ?

[drew at math.mit.edu]

I agree that the description should be clarified. I encountered the same 
problem some time ago with A014602 and A014603, both of which only list 
fundamental discriminants without making this constraint explicit.

If someone is motivated to clean this up, it would probably be worth having 
4 distinct, properly named sequences for each class number n, e.g.:

   imaginary quadratic discriminants of class number n
   fundamental imaginary quadratic discriminants of class number n
   real quadratic discriminants of class number n
   fundamental real quadratic discriminants of class number n

I would suggest treating at least n=1,2,3, and possibly up to 10, since we 
already cover some of these cases.

Drew

On Apr 28 2010, Max Alekseyev wrote:

>It seems that discrepancy comes from the fact that 148 is not a
>fundamental discriminant (given by A003658), while the sequence
>A094612 and similar include only fundamental discriminants. If so,
>that needs to be specified in the descriptions of these sequences.
>Max
>
>On Wed, Apr 28, 2010 at 4:22 PM, Max Alekseyev <maxale at gmail.com> wrote:
>> SeqFans,
>>
>> My PARI/GP claims that 148 must be an element of A094612:
>>
>> ? qfbclassno(148)
>> %1 = 3
>>
>> Could somebody please check Mathematica code given there and see why
>> 148 is missing.
>>
>> Thanks,
>> Max
>>
>
>
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