Ive been working this sequence for over a year now . Please help anyone

2,7,8,1,7,4,2,8,4,8,2,1,5,4,7,5,7,7,5,8,

there are two more numbers to the sequence but I just have not been able to get them Please help

John

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- Jan 20th 2011, 11:16 AMmisterobsessedSequence 2,7,8,1,7,4,2,8,4,8,2,1,5,4,7,5,7,7,5,8,
Ive been working this sequence for over a year now . Please help anyone

2,7,8,1,7,4,2,8,4,8,2,1,5,4,7,5,7,7,5,8,

there are two more numbers to the sequence but I just have not been able to get them Please help

John - Jan 20th 2011, 11:33 AMFernandoRevilla

There are twenty numbers: $\displaystyle a_1,\ldots,a_{20}$ in your sequence. If I have understood correctly your question, you want to find $\displaystyle a_{21}$ and $\displaystyle a_{22}$ finding a determined rule. Well, in that case the correct answer is $\displaystyle a_{21}=\alpha$ and $\displaystyle a_{22}=\beta$ being $\displaystyle \alpha$ and $\displaystyle \beta$ chosen at random. And all of his as a consequence of a well known result about the Lagrange interpolation polynomial.

Fernando Revilla - Jan 21st 2011, 12:51 AMOpalg
I can see why you think that a math help forum might be the place for this problem, but I suspect that the answer may not involve mathematics at all. If I had to guess, I would suspect that these numbers might perhaps be the lengths of the words in some saying, poem, song, something like that?

Where did this sequence come from, and how do you know that there are only two more elements in it? If you can give us something of the background to the problem, it might give some clues about what the sequence represents. - Jan 22nd 2011, 09:26 AMWilmer
The sequence sure looks like the digits of e plus a few from pi thrown in!!

Could even be forming 3 words, like from telephone: 2 = a,b,c 3 = d,e,f ... (1 = blank: separating words) - Jan 27th 2011, 07:46 AMChris11
- Mar 28th 2011, 10:26 AMInigo
It seems to me that this is a brute force random permutation...is this a snippet of code from a video game or audio program on shuffle?

- Apr 23rd 2011, 12:56 PMproofhoe95
Well, it's very obviously not a function, so the previous posts noting that this isn't exactly a mathematical problem are very correct. I would tend to agree that it is probably a numerical transcription of some text.

- Apr 23rd 2011, 01:37 PMtopsquark
I wouldn't worry about it as the OP never made a response. Obviously it wasn't that important to him/her.

-Dan - Apr 23rd 2011, 08:03 PMCaptainBlack
When I see such a sequence the first thing I do if the general form is not obvious is search the Online Encyclopedia of Integer Sequences, and lo - it knows this sequence not.

(this is probably a neopets puzzle)

CB