A Sequence of Positive Integers is called an iteration sequence if there
Exists a strictly increasing sequence of Positive Integers such that
and
for , 3, .... A Necessary and Sufficient condition for
to be an iteration sequence is

for all .

**References**

Kimberling, C. ``Interspersions and Dispersions.'' *Proc. Amer. Math. Soc.* **117**, 313-321, 1993.

© 1996-9

1999-05-26