以下是Linkin Park的《Somewhere I Belong》的歌詞：
Verse 1:
I'm lost and I'm trying to find my way
But every road leads to a dead end street
I'm feeling like I don't belong
Chorus:
Somewhere I belong
I'm trying to find my place
In this world that we all share
But it's hard to fit in
Verse 2:
People talk but they don't understand
It's like I'm living in a different land
But I know I'm not the only one
Chorus:
Somewhere I belong
I'm trying to find my place
In this world that we all share
But it's hard to fit in
Bridge:
So where do I go from here?
Is there a place that I can feel safe?
Is there a place where I can be me?
Chorus:
And I'll keep trying
Until I find it
Somewhere I belong
Outro:
I belong somewhere已知數列｛an｝的通項公式為an=n(n+1)，則該數列的前n項和為_______.
【分析】
本題考查數列求和，根據通項公式求出數列前$n$項和的表達式即可求解．
【解答】
解：由題意得，$a_{n} = n(n + 1) = n^{2} + n$，
所以$S_{n} = (1^{2} + 1) + (2^{2} + 2) + \ldots + (n^{2} + n)$，
$= (1 + 2 + \ldots + n) + (1 + 2 + \ldots + n)$，
$= \frac{n(n + 1)(n + 2)}{3} + \frac{n(n + 1)}{2}$．
故答案為$\frac{n(n + 1)(n + 2)}{3} + \frac{n(n + 1)}{2}$．