import numpy N = int(input()) if N <= 9: n=N Arr = numpy.zeros((N, N), dtype=numpy.int16)
num = 1 i = 0 j = 0 times = N while num <= N * N: for _ in range(times): Arr[i][j] = num num += 1 j += 1 times -= 1 j -= 1 i += 1 for _ in range(times): Arr[i][j] = num num += 1 i += 1 i -= 1 j -= 1 for _ in range(times): Arr[i][j] = num num += 1 j -= 1 times -= 1 j += 1 i -= 1 for _ in range(times): Arr[i][j] = num num += 1 i -= 1 i += 1 j += 1 print(Arr)