[seqfan] Sums of each ten terms of A033308

[zak seidov]

Take A033308 Decimal expansion of Copeland-Erdos constant:concatenate primes:

2,3,5,7,1,1,1,3,1,7,1,9,2,3,2,9,3,1,3,7,4,1,4,3,4,7,5,3,5,9,6,1,6,7,7,1,7,3,7,9,8,3,8,9,9,7,1,0,1,...

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?

Thanks, Zak

    http://zak08.livejournal.com/18557.html