[seqfan] Re: correcting A181539

[Max Alekseyev]

The current A181539 does not seem to match its definition:
for example, why a(2)=51 and not a(2)=49 (let alone a(2)=1)?

I would rather change the definition to:

a(n) = smallest number m > 1 such that m^2 == 1 (mod 10^n)

that would give a sequence:

9, 49, 249, 1249, 18751, 218751, 781249, 24218751, 74218751,
1425781249, 13574218751, 163574218751, 163574218751, 19836425781249,
19836425781249, 2480163574218751, 12519836425781249,
12519836425781249, 487480163574218751, 15487480163574218751,
215487480163574218751, 215487480163574218751, 4784512519836425781249,
45215487480163574218751, 45215487480163574218751

Regards,
Max

On Wed, Nov 3, 2010 at 8:29 AM, Richard Mathar
<mathar at strw.leidenuniv.nl> wrote:
>
> Is there a way to keep the terms in http://oeis.org/classic/A181539
> (current definition m: m^2 =1 (mod 10^n) by changing the definition? I'd expect
> some corresponding terms of http://oeis.org/classic/A181607  to appear, but I
> cannot figure out which modification in A181539 would do that
> selection/matching.
>
> [Cultural notice: these are called hidden variables in physics - parameters
> that steer the behaviour of quantum particles although they are not
> measurable in the classical sense. In newsgroups, these are words/phrases
> that are avoided by people because of some sort of shame. The applicable
> anecdote is the correction by a wikipedia robot removing my
> OEIS tags in  http://en.wikipedia.org/wiki/Zeta_constant
> because (citing  http://en.wikipedia.org/wiki/User_talk:R._J._Mathar)
> "making a minor change with obscenities."]
>
> RJM
>
>
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