Don't even think of counting manually

Algebra Level 3

\[\color{violet}{1 \\ 3 \quad 5 \\ 7 \quad 9 \quad 11 \\ 13 \quad 15 \quad 17 \quad 19 \\ 21 \quad 23 \quad 25 \quad 27 \quad 29 \\ ........................... \\..............................}\] **Find the sum of numbers in the 123rd row.


You can try my other Sequences And Series problems by clicking here : Part II and here : Part I..
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