[seqfan] Re: Rif: Using the OEIS on a very hot day

[jean-paul allouche]

Hi

Since I do understand your disappointment [being French :-) ], I tried 
to find a case
where the contrary happens. After a few unsuccessful trials I came accross
1, 30, 53 which is not (not yet?) in the OEIS, though 30, 1, 53 is.
I am not sure my remark is worth a Fields medal though, smiles.

best wishes from this side of the Channel
jean-paul


Le 30/07/2018 à 09:16, john.mason at lispa.it a écrit :
> I tried my birth date (DD,MM,YY) and found nothing. Then I tried US format
>   (MM,DD,YY) and found 5 sequences.
> As a Briton, I find this very disappointing.
> __________________________________
>
>
>
>
> Da:     "Peter Luschny" <peter.luschny at gmail.com>
> Per:    seqfan at list.seqfan.eu
> Data:   28/07/2018 23:09
> Oggetto:        [seqfan] Using the OEIS on a very hot day
> Inviato da:     "SeqFan" <seqfan-bounces at list.seqfan.eu>
>
>
>
> It's really, really hot here and I am sitting with my buddy
> Hans on the veranda.
>
> Asks Hans: "Does the OEIS has any real use?"
> Me: "I don't know."
>
> After a while Hans demands: "Give me your birthday!"
> He took his tablet and entered the three numbers in
> the search box of the OEIS.
>
> Hans: "Ah, did you know that these are all prime numbers?"
> Me: "No, I don't care about such things."
>
> After scrolling for a while through the many pages the
> database returned Hans said:
>
> "But these are not ordinary prime numbers. They are all
> related in a peculiar way to twin primes."
>
> Me: "Really?", reluctantly I opened my eyes. Hans indeed found
> a sequence which gives a formula relating them all in the
> same way to twin primes.
>
> Moreover, assuming that they represent the components of a
> date, say between 1935 and today, they uniquely identify this
> date. So I could trade in the date of my birthday for the
> A-number of this sequence and save 2 digits.
>
> Hans: "Well now, do you see that the OEIS has good use?"
> Me: "Hm, maybe..."
>
> Cheers, Peter
>
> P.S. What's about your birthday in the OEIS?
>
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