what is the 50th term of term of the series 1,3,6,10,15,21

what is the 50th term of term of the series 1,3,6,10,15,21?

~8 minAnswer checked instantly

AQuA-RAT — Algebra Question Answering with Rationales (Ling et al., DeepMind, 2017) · train #73487

Stuck? A gentle nudge

No hints for this one.

Something off?

Workspace

Your answer

Checked against the answer in AQuA-RAT.