May 08 2006: two items

[N. J. A. Sloane]

Dear Seqfans:
1. Today we changed over to the new machines. The URLs for the 
OEIS should still work. But many of my updating programs will
need to be modified.  Let me know if you notice any strange
behavior, in the OEIS or in my other home pages.

2.  Luc Stevens suggested looking at the sequences that I now call RADD
sequences (not to be confused with the old RATS, Reverse, Add Then Sort sequences):
T(S,Q) is formed by starting with S; to get later terms, reverse previous 
term annd add Q.

For a summary of these sequences, see the article "Sequences
of RADD type" that is linked to A117831.  This gives a lot of data about
these sequences, including  many references to new entries in the OEIS.

Example:  T(1,1) is 1,2,3,4,5,6,7,8,9,10,2,3,4,5,6,7,... (A117230)
which reaches a cycle of length 9 in 1 step.

But T(1,10) never cycles (A117841).

My question is, has anyone seen any previous work on these sequences?
How can they possibly be new? Surely someone must
have determined which ones cycle and which do not?

Can anyone supply references?

Neil