[seqfan] Re: Sorting out incorrect versions of sequences

[Alois Heinz]

I would change the definition.

There are more sequences like A161563:

A167446 Fibonacci(n)!!!.
A167748 EulerPhi(n!!!).

Alois

Charles Greathouse schrieb:
> A161563 is described as "Triple factorials n!!!" and begins
> 1, 1, 2, 6, 40320, 1307674368000, ...
>
> The Math'ca code it gives is n!!!, which is parsed as (n!!)!.  So a(5)
> = (5!!)! = 15! = 1307674368000.
>
> Should I mark this as an erroneous version of A007661, or should I
> change the definition to "Factorials of double factorials"?  This
> seems to have implications for many of the unedited sequences so I
> thought I'd ask here.
>
> Charles Greathouse
> Analyst/Programmer
> Case Western Reserve University
>
>
> _______________________________________________
>
> Seqfan Mailing list - http://list.seqfan.eu/
>
>   


-- 
Email:   heinz at hs-heilbronn.de  (Prof. Dr. Alois Heinz)
Address: Hochschule Heilbronn
          Max-Planck-Str. 39, D-74081 Heilbronn, GERMANY
Phone:   +49-7131-504-456, Fax: +49-7131-504-14-456-2
URL:     http://mitarbeiter.hs-heilbronn.de/~heinz/