The conversation between human and AI assistant.
[|Human|] Given a sequence of numbers, find and describe the pattern.
[|AI|] The pattern in this sequence of numbers is an arithmetic progression with a common difference of 4. Each number in the sequence is obtained by adding 4 to the previous number. So, starting with the first number, 3, we add 4 to get 7, then add 4 again to get 11, and so on. The sequence progresses as follows: 3, 3+4, 7+4, 11+4, 15+4....
[|Human|] 
Given a sequence of numbers, find and describe the pattern.