A063914.

[Antti Karttunen]

"Brian L. Galebach" wrote:

> Actually, it [A063914 = 2,3,5,5,8,7,11,...] is simpler than that.  It is just
> 2 interleaved sequences.
> Sorry about that.
>
> B.G.

Should Neil add this to his Puzzle-page, with a comment
"Even world renown number theoreticists have been left baffled
by this sequence"... ??? ;-> (No harm intended).
Well, I didn't see it at either, but my simple Lisp-program
could solve it easily, if I added a bisection feature to it.

Here's a clumsy variant, how the originally given 7 terms could be continued:
2,3,5,5,8,7,11,18,18,29,10,16,26,26,42,15,24,39,39,63,...

for a hint, see Neil's classic sequences,
http://www.research.att.com/~njas/sequences/classic.html
Anyway, it's so ugly, that I don't want to submit it.

Terveisin,

Antti



>
>
> -----Original Message-----
> From: Brian L. Galebach [mailto:briang at SEGmail.com]
> Sent: Wednesday, September 05, 2001 9:15 AM
> To: njas at research.att.com; seqfan at ext.jussieu.fr
> Subject: RE: Away Sep 07 - 17
>
> The second sequence is...
>
> 2     3     5     5     8     7    11     9    14    11    17    13
> 20    15    23    17    26    19    29    21    32    23    35    25
> 38    27    41    29    44    31    47    33    50    35    53    37
> 56    39    59    41    62    43    65    45    68    47    71    49
> 74    51    77    53    80    55    83    57    86    59    89    61
> 92    63    95    65    98    67   101    69   104    71   107    73
> 110    75   113    77   116    79   119    81   122    83   125    85
> 128    87   131    89   134    91   137    93   140    95   143    97
> 146    99   149   101   152   103
>
> A pattern can be seen by looking at the difference between the differences
> of adjacent terms.
>
> Brian Galebach
>
> %I A063914
> %S A063914 2,3,5,5,8,7,11
> %N A063914 A problem in a 5th grade workbook. Explanation unknown.
> %D A063914 D. Dolan, J. Williamson, and M. Muri, Mathematics Activities for
> Elementary School Teachers: A Problem Solving Approach, Addison Wesley
> Longman, Inc., NY, Fourth Edition (ISBN 0-201-61321-2), Chapter 1, Activity
> 2, #9.
> %K A063914 nonn,unkn,new
> %O A063914 1,1
> %A A063914 Nancy Shaffer (nancys at rose.net), Aug 30 2001
>
> NJAS