# [seqfan] Re: A Sequential Puzzle

Fred Lunnon fred.lunnon at gmail.com
Sun Mar 25 03:21:58 CEST 2018

```  This has to be the solution --- notice that the problem carefully avoids
specifying an integer sequence, and moreover flags that the value of
q  is a surprise.    WFL

On 3/24/18, rene.gy at numericable.com <rene.gy at numericable.com> wrote:
> This could be   (5!/n)(2^n -1)     from n=-3 to n=+6 , but then it is no
> integer sequence, and q =120*Log[2].
>
>
>
> -----Message d'origine-----
> From: charliemath at optonline.net
> Sent: Saturday, March 24, 2018 3:21 PM
> To: Sequence Fanatics Discussion list
> Subject: [seqfan] A Sequential Puzzle
>
> Some SeqFans may already be acquainted with a weekly column  entitled
> Varsity Math, published Saturdays in the Wall St. Journal's Review
> section.
>
>
> The second ot two problems in today's edition is called The Missing
> Element and reads as follows:
>
>
> The open-ended sequence ...35,45, 60, q, 120,180,280, 450, 744, 1260,...
> has an undisclosed element, q.  Find a simple continuous function to
> generate the sequence and compute the surprise answer for q.
>
>
> I did a search for any sequence that contains 35 45 60 120 180 280 450
> 744 1260.
> Seqence A103252 contains each value except 744.  No sequence contains
> all 9 values.
>
>
> I'm guessing this sequence, once found, will make its way into OEIS.
>
>
> Enjoy!
>
>
> Charlie Marion
>
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>
>
>
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>
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