Math

>>369421
Sine wave propagation along x-axis as a function of sin (y). Then just give it two values that come out as
>--++--++--++--++...

Up to you which values you want.

>>369421
if I remember correctly the fibonacci series has numbers in succession like the following:
o p o o p o o p o o p o o p o o p ...
where o stands for odd and p for pair
Here is how you define it:
U1= 1
U2= 2
Un+2= Un + Un+1
Using the a spread sheet program here are the first 27 terms of the series:
1
2
3
5
8
13
21
34
55
89
144
233
377
610
987
1597
2584
4181
6765
10946
17711
28657
46368
75025
121393
196418
317811

making n in Xn follow the fibonacci series solves this problem.

>>369571
In the last sentence I had a typo:

I meant to say:
>making n in (-1)^n follow the fibonacci series solves this problem

>>369421
(-1)^(floor(n/2) + 1)

n: 0 1 2 3 4 5 6 7 8...
e: 1 1 2 2 3 3 4 4 5...