Using a Random.Range Not Works Correctly Unity3d

i want create random number and i use Random.Range method. But when i am call random.range it gives me a odd number and i call again it give me a even number. i mean;

example
calling random.range =1
calling random.range =4
calling random.range =17
calling random.range =2
calling random.range =3

one odd number one even number but i dont want this i want

example
calling random.range =1
calling random.range =5
calling random.range =4
calling random.range =7
calling random.range =6
calling random.range =12

how can i fix that