Phone Code Equation and Key

1
1

2
ABC

3
DEF

4
GHI

5
JKL

6
MNO

7
PQRS

8
TUV

9
WXYZ

 

0
0

 


Digit Number Choices

0 1

1

2 3 4 5 6 8

3

7 9

4

Where X equals the digit on the phone, and y equals the current total of numbers in the series
(starting at and incrementing by 1 for each number):

Xy × ... × Xn = Total Number of Phone Number to Letter Conversions