Math Logic 

Question : 
What
is an Arithmetic Sequence ? 
Answer : 
An arithmetic sequence is a sequence of numbers in which two consecutive terms always have the same difference. 
In general, the terms of an arithmetic sequence with the first term a_{0} and
common difference d, have the form a_{n} = d_{n}+a_{0} (n=0,1,2,...).

Examples of arithmetic sequence:
1, 7, 13, 19, 25, 31, 37, ...
5, 11, 17, 23, 29, 35, 41, ... 
