Kamila's triangle of odd numbers

Probability Level 2

Kamilla constructs the following triangle of positive odd numbers:

135791113151719 \begin{array} { l l l l l } 1 \\ 3 & 5 \\ 7 & 9 & 11 \\ 13 & 15 & 17 & 19 \\ \end{array}

On which row will the number 2013 appear?

This problem is shared by Kamilla L.

Details and assumptions

The pattern of the triangle is that there are nn numbers in the nnth row and that each entry is 2 more than the previous value.

The numbers 13,15,1713, 15, 17 and 19 appear in the 4th row.

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