# [seqfan] Re: An Audiosurf-based sequence

Allan Wechsler acwacw at gmail.com
Thu Aug 27 04:26:49 CEST 2020

```I gave this a cursory look and I'm going to guess that there's "no there
there". I suspect the point-values are hard-coded, and that somewhere in
the code a developer just typed in a sequence of numbers that felt right.

The first differences are encouraging at first: 37, 46, 55, 62, 67, 72 ...
but if you look at the second differences they seem kind of random: 9, 9,
7, 5, 5, 4, 6, 1, 2, -3, ... so the first differences aren't even
monotonically increasing.

So I think your expectation is correct.

On Wed, Aug 26, 2020 at 7:09 AM Daniel via SeqFan <seqfan at list.seqfan.eu>
wrote:

> Hi all,
> In the spirit of such esoteric game-based sequences as A306221, A060225,
> and A054863, I looked into the game Audiosurf, in which the player collects
> colored blocks while driving down a track. I was curious as to whether the
> points scored for matches of different sizes had any kind of underlying
> logic.
> The base point scores for sets of purple-colored blocks are as follows
> (starting with a set of 3 blocks and incrementing by 1):36 73 119 174 236
> 303 375 451 531 612 695 775 854 929 1001 1070 1136 1199 1260
> For which superseeker returned this:
> >The gfun package's guessgf function identified thesepossible generating
> functions.>Warning! These may only be approximations!
> >
> revogf    RootOf(-y+(3*y+36)*_Z+(-3*y-35)*_Z^2+(y+8)*_Z^3-2*_Z^5-2*_Z^6-_Z^8-3*_Z^10+_Z^11-5*_Z^12+2*_Z^13-3*_Z^14+_Z^15)
> Other colored blocks give points as a simple whole-number multiple of the
> above sequence (for example, red blocks are worth 8 times as many points)
> so those are not of separate interest. However, when playing in Mono mode,
> the score is multiplied by 3.33 and then rounded:
> 120 243 398 580 786 1010 1251 1504 1768 2041 2316 2585 2846 3097 3337 3567
> 3787 3997 4200
>
> I don't expect either of these sequences to be worth adding, but I thought
> I'd throw it out there in case any of you come up with something.
>
>
>
>
> Daniel Sterman
>
> --
> Seqfan Mailing list - http://list.seqfan.eu/
>

```