# Find sequence using sum of sequence

Algebra Level 4

Let $$S_n$$ be the sum of the sequence $$\{a_n\}$$ from $$a_1$$ to $$a_n.$$ If the following holds: $a_1 =1 \ , \ a_{n+1}=S_n + n+ 1 \text{ for } n=1,2,3,\cdots,$ what is $$a_{10}?$$

×