[seqfan] Re: an idea for a sequence

[Giovanni Resta]

On 03/02/2014 01:39 AM, David Newman wrote:

> What are the numbers which can be written using their own base 10 digits
> (in the same frequency that they appear in the original number) and the
> usual symbols +, -, / ,^, (, ) ?

They are known as Friedman numbers A036057.

You missed 25 = 5^2 and 126 = 21*6.

I've computed all the Friedman numbers up to 10^6.

Giovanni Resta