Present the even number (if it divides by 4) as a difference of two integer squares ?

[Richard Mathar]

I thought it was a little bit interesting because it came up in the
context of this quadratic form, and then there's the connection
between hours elapsed: 24a+7 means 07:00, while 7a+24 means, um,
something if we had 24 7-hour days?  OK, it's a bit of a stretch.  A
lot of a stretch.

Why don't we just include all infinitely many sequences of this type?
(I still hope for the day when superseeker becomes computationally
cheap enough that you can get it on the web site; then the OEIS really
could "contain" all sequences of this type.)

--Joshua Zucker


On Thu, Apr 24, 2008 at 5:19 AM,  <franktaw at netscape.net> wrote:
> But any time we look at [numbers/primes/whatever] that are both of the
>  form an+b and bm+a with a and b relatively prime, we can find a c such
>  that these are just the [numbers/primes/whatever] of the form abk+c.
>  (This statement can be generalized to a considerable extent, but that
>  isn't the point here.)  Do you want to add all such cases to the OEIS?
>  (There are infinitely many of them.)  How do you decide?  Where do
>  you stop?
>
>  There is, in fact, a policy for the OEIS that sequences with arbitrary
>  parameters are not included.  This clearly falls under that description.
>
>  Franklin T. Adams-Watters