[seqfan] Re: A173279 and A173280

[Klaus Brockhaus]

Richard Mathar schrieb:
> kb> Does that suffice? What about 
> kb> 
> kb> %N A173317 a(n)=5*n!-1
> kb> %F A173317 a(n)=5*n!-1
>
> [.....]
>   
> Here, this sort of repetition makes sense to verify that the exclamation
> mark in the definition is not an emphatic n but a factorial:
>
> %N A173317 5*n!-1.
> %F A173317 a(n) = 5*A000142(n)-1.
>   
Although rather incredible notational aberrations can be found in some
OEIS entries - an emphatic exclamation mark in the context of
a multiplication star and a minus dash goes probably far beyond that.