zeroless squares / will be away

[N. J. A. Sloane]

1. A recent message from Richard Schroeppel has drawn attention to
the question: Are there infinitely many squares with all digits not zero?
The sequence is A052041.
It might be interesting to see the sequence
a(n) = number of n-digit squares with no zero digits
, if someone would care to work it out.

Richard asks in particular, can one find an explicit infinite
sequence of squares with no zero digits?  E.g. can one generalize 
6666^2 = 44435556 ?

2. I will be traveling Mar 2 - 7, no updates during that period.
But all messages will be saved.  There are still 200 Comments
waiting to be processed, and I may not
get caught up until the middle of March.

NJAS