[seqfan] Re: an idea for a sequence

[Heinz, Alois]

The first example (121=11^2)shows that you also allow
the concat operator ".": (11=1.1 and 121=(1.1)^2)

This means that the sequence is A001477.

Best regards, Alois

Am 02.03.2014 01:39, schrieb David Newman:
> As a rule I don't like sequences which are base dependant, but here's one
> anyway.
>
> 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 +, -, / ,^, (, ) ?
>
> The first three that I've found are:
>
> 121=11^2
>
> 127= (2^7)-1
>
> 128= 2^(8-1)
>
> The example for 127 was suggested by Joseph Lewittes as appropriate for the
> first of Adar.
>
> I haven't found it in the OEIS.
>
> Anyone  interested in calculating some more terms may feel free to do so
> and propose it.