Diamond inlaid magic square is a very special magic square. It will have all odd numbers placed in the center in a Diamond shape and all even numbers distributed in four seperate ttriangular shape in the four corners,

In the above 21 x 21 diamond inlaid magic square, all the numbers from 1 to 441 are used. All the vertical, Horizontal and both diagonal totals are equal to 4641.

**I have done a 1999 x 1999 Diamond inlaid magic square in which all the numbers from 1 to 39,96,001 are used. All Horizontal, vertical and both diagonal totals will be 399,40,03,999. ( Three hndred ninty nine crores, forty lakhs, three thousand and nine hundred and ninety nine) or 3,994,003,999 ( Three trillion, 994 million, three thousand nine hundred and niniety nine)**

**Thanks to the Almighty for giving me the idea, guided me, till the final execution to make it a reality**