Sum-of-odd-numbers.md

Given the triangle of consecutive odd numbers:

             1
          3     5
       7     9    11
   13    15    17    19
21    23    25    27    29
...

Calculate the sum of the numbers in the nth row of this triangle (starting at index 1) e.g.: (Input --> Output)

1 -->  1
2 --> 3 + 5 = 8

/*
the table "nums" contains an integer "n", the number
return your result in a column "res"
*/

SELECT POWER(n, 3)::integer as res FROM nums;