Recursive Sequence Sum

Algebra Level 3

Let ana_n be a recursive function satisfying an=an1+2n1a_n=a_{n-1}+2n-1 for all positive integers nn, and a0=0a_0=0. What is the value of n=1100an\displaystyle \sum _{n=1}^{100}a_n?


Try Part II

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