[seqfan] Re 2 seqs with diffs distinct

[N. J. A. Sloane]

Dear Seq Fans

On March 27 I posed a question to the list, and several
people responded.  The two sequences will be visible - in a few minutes -
as A169677 and A169678.
Thanks to everone who replied.

Now that the sequences exist in the OEIS, we can ask: what
are their properties?  (Rate of growth, relationship to
other sequences, e.g. Ulam-type sequences, see Index to OEIS, 
etc.) The graphs are surprisingly irregular.

Zak,  I believe you did a version using only primes?
Will you please submit it now?

Neil