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what is the next term of 13, 9, 5, 1

Please help with number patern on 13, 9, 5, 1
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2 Answers

The sequence is :
 
Term
   1         13 - 4*0 = 13
   2         13 - 4*1 =  9
   3         13 - 4*2 =  5
   4         13 - 4*3 =  1
   5         13 - 4*4 = -3
  ...
   n         13 - 4(n-1); n=1, 2, 3, ...

Comments

Four is being subtracted each time.
13 - 4 = 9
9 - 4 = 5
5 - 4 = 1

Comments

if it was 1, 5, 9, 13 
Then the term is  Tn= 4n - 3
 
But this one is working in reverse?
 
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