[seqfan] Re: deja vu
Allan Wechsler
acwacw at gmail.com
Sun Dec 28 19:02:22 CET 2014
This reference sent me, eventually, to http://oeis.org/A003474. Vladeta
Jovovic noted that this A003474(n) is always divisible by n, and created
A094678(n) = A003474(n)/n.
I note that A003474(n) is often divisible by higher powers of n, and tried
writing A003474(n) as M(n)*n^K(n), for maximal K. K is undefined for n = 1,
but starting at n = 2 it goes 2, 2, 2, 1, 2, 1, 3, 4, 2, 4... This is not
in OEIS, and neither is M(n) (starting at n = 1): 1, 1, 2, 2, 32, 9, 208,
4, 2, 256, 8...
Perhaps something obvious is going on here; I don't understand the
definition of A003474 yet.
On Sun, Dec 28, 2014 at 11:36 AM, Joerg Arndt <arndt at jjj.de> wrote:
> * David Newman <davidsnewman at gmail.com> [Dec 28. 2014 17:14]:
> > I just had the experience of thinking of a sequence, calculating the
> first
> > few terms, and looking it up in the OEIS, only to find that its entry,
> from
> > more than five years ago, listed me as its author.
> >
> > Have I, perhaps, written this note to the Sequence Fans before?
> >
>
> Someone had, the wording being (from my recollection) quite similar
> to your message (obviously first sentence only).
>
> A recent version of "pleasantly surprised by additions of others" is
> https://oeis.org/A192513
>
> > _______________________________________________
> >
> > Seqfan Mailing list - http://list.seqfan.eu/
>
> _______________________________________________
>
> Seqfan Mailing list - http://list.seqfan.eu/
>
More information about the SeqFan
mailing list