[seqfan] Re: A000657 Median Euler numbers

[Alois Heinz]

Your values are correct.

The provided maple code will generate the same correct
values if the "Digits" parameter is increased and the float
values are rounded.

Regards, Alois

Am 22.12.2010 21:19, schrieb Sean A. Irvine:
> Hi,
>
> I have been trying to reproduce A000657 using the supplied formulas
> and maple code.  The formula and maple code agree with each other,
> but give a different result to the listed sequence for a(9) onwards.
>
> Assuming, the generating function is correct, then I get:
>
> 1
> 1
> 4
> 46
> 1024
> 36976
> 1965664
> 144361456
> 13997185024
> 1731678144256    [different from value in OEIS, 1731678144472]
> 266182076161024
> 49763143319190016
> 11118629668610842624
> 2925890822304510631936
> 895658946905031792553984
>
> If these are correct, then A000657 appears to be simply an unsigned
> version of A099023.
>
> Does anyone understand A000657 well enough to comment?
>
> Regards,
> Sean.
>
>
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