[seqfan] Re: Sums of each ten terms of A033308

franktaw at netscape.net franktaw at netscape.net
Sun Jan 10 22:08:59 CET 2010

Well, it's a base 10 related sequence to start with.

Franklin T. Adams-Watters

-----Original Message-----
From: Jeremy Gardiner <jeremy.gardiner at btinternet.com>

Why groups of 10? What happens with other partitions?

On 9/1/10 07:53, "zak seidov" <zakseidov at yahoo.com> wrote:

> Take A033308 Decimal expansion of Copeland-Erdos constant:concatenate 
> 9,8,3,8,9,9,7,1,0,1,...
> Partition it in groups of 10 and write down sums of each group:
> p10 = 31,40,45,54,47,23,29,35,44,41,51,24,38,35,51,38,26,38,53,...
> Graph of p10 shows some misterious (quasi-)periodicity of length 
about 50:
>  Is it real? Any explanation?

More information about the SeqFan mailing list