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Add the first \(\color{#ef3e45}{n}\) integers

For example, the sum of the first three integers is 1 + 2 + 3 = 6.

What is the sum of the first **{n}** integers? (Answer: {s})

{#1}
Note: The following array contains the sums of the first integers,

i.e. [ 1, 1+2, 1+2+3, etc.] up to the sum of the first {n} integers:

[ {=list[0]}, {=list[1]}, {=list[2]}, {=list[3]}, {=list[4]}, {=list[5]}, {=list[6]}, {=list[7]}, {=list[8]}, {=list[9]} ]

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