[math-fun] Unsolved? problem

[alexandre.wajnberg at skynet.be]

Hello,


14 avr 2005, 01:23 Europe/Brussels, Richard Guy wrote :

> C & S sent the following results:
> There appear to be 5 seqs beginning with
> integers less than 1000 which do not merge.
> These sequences were carried out to
> 10^8 or more.  The calculations are:
>
> 1,2,3,4,7,8,..,96532994,144799494,...(31)
> 393,528,545,660,682,727,...,97622612,
>              122028268,... (9)
> 412,518,565,684,709,710,..., 92029059,
>              102254514,... (46)
> 668,838,1260,1278,1355,1632,...,91127590,
>              100240357,... (52)
> 932,1168,1244,1558,1621,1622,...,98457737,
>              112523136,... (30)
>
> (...)

> Should the last 4 of the above
> 5 seqs be in OEIS ??    R.]]

I would suggest also the sequence of the beginnings of the sequences 
which do not merge, for instance here (to be completed!): 393, 412, 
668, 932...

Alexandre