(Solved): Finding the Closed Formula for an (1 point) For each sequence given below, find a closed formula for ...

(1 point) For each sequence given below, find a closed formula for \( a_{n} \), the \( n \)th term of the sequence (assume the first terms here are always \( a_{0} \) ) by relating it to another sequence for which you already kno the formula. a. \( -1,0,2,6,14,30, \ldots \) \( a_{n}= \) b. \( -2,-1,6,25,62,123, \ldots \) \( a_{n}= \) c. \( 1,4,13,28,49,76, \ldots \) \( a_{n}= \) d. \( 0,2,11,33,74,140, \ldots \) \( a_{n}= \) Hint: Note: You can eam partial credit on this problem.