A famous Hindu mathematician, Aryabhata, showed (in around 500 C.E.) you could add up the first n triangular numbers with a relatively simple formula:

`(n(n+1)(n+2))/6=T_1+T_2+T_3+...+T_n`

Use this fact to find the sum of the first 11 triangular numbers.

Answer: The sum of the first 11 square numbers is