Base equation

```
(J3+x)/150
```

Multiply answer by `x`

then divide all by `150`

and Repeat

```
( ((J3+x)/150)x )/150
(( ( ((J3+x)/150)x )/150 )x)/150
```

Keep repeating until the answer to the last repeat is `<=1`

. Sum all parts.

Perhaps seeing this visually will better explain it.

Right now I've simply broken up the equation into several cells and then sum them but this is terribly inefficient.

```
A1: =(J3+x)/150
B1: =(((J3+x)/150)x)/150
C1: =(( (((J3+x)/150)x)/150 )x)/150
D1: =(( (( (((J3+x)/150)x)/150 )x)/150 )x)/150
E1: etc, etc
```

`x`

is not suppose to go over 150. – deflime Jan 6 '15 at 7:47