The sum of the first 1,200 odd numbers 1,440,000.
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1, 3, 5, 7, 9, 11, 13, 15, 17, 19, 21, 23, 25, 27, 29, 31, 33,
35, 37, 39, 41, 43, 45, 47, 49, 51, 53, 55, 57, 59, 61, 63, 65, 67,
69, 71, 73, 75, 77, 79, 81, 83, 85, 87, 89, 91, 93, 95, 97, 99,
101, 103, 105, 107, 109, 111, 113, 115, 117, 119, 121, 123, 125,
127, 129, 131, 133, 135, 137, 139, 141, 143, 145, 147, 149, 151,
153, 155, 157, 159,161,163,165,167,169,171,173,175,177,179,181,183,185,187,189,191,193,195,197,199
The sum of the first 1,000 odd numbers is 1,000,000.
The sum of the first 13 odd numbers is 169.
The sum of the first nine odd numbers is 81.
The sum of the first 153 odd numbers is 23,409.
The sum of the first 50 odd numbers is 2,500.