N is an integer, and an algebraic expression containing N is used to express that two consecutive odd numbers are integers Two consecutive even numbers are ．

If n is an integer, then the odd number is expressed by the algebraic expression of N: 2n + 1. Then two adjacent odd numbers 2n + 1, 2n + 3 or 2N-1, 2n + 1. If even number is generally expressed by 2n, then two adjacent even numbers 2n, 2n + 2 or 2n-2, 2n. So the answer is: 2n + 1, 2n + 3 or 2N-1, 2n + 1; 2n, 2n + 2 or 2n-2, 2n