Number spiral diagonals
Starting with the number 1 and moving to the right in a clockwise direction a 5 by 5 spiral is formed as follows:s
It can be verified that the sum of the numbers on the diagonals is 101.
What is the sum of the numbers on the diagonals in a 1001 by 1001 spiral formed in the same way?
从1开始，按顺时针顺序向右铺开的5 × 5螺旋数阵如下所示：
以同样方式构成的1001 × 1001螺旋数阵对角线上的数之和是多少？