题解 | 构造数列

c = int(input())
for i in range(c):
    n = int(input())
    if n // 2 % 2 == 1:
        print('NO')
    else:
        print('YES')
        i = 2
        for _ in range(n//2):
            print(i,end=' ')
            i += 2
        i = 1
        for _ in range(n//2-1):
            print(i,end=' ')
            i += 2
        print(i+n//2,end=' ')
        print()