use polynomial fitting to find the formula for the nth term of the sequences (an )n≥0 below.
a. 2, 5, 11, 21, 36,...
b. 0, 2, 6, 12, 20....
C. 1, 2, 4, 8, 15, 26 ...
d. 3, 6, 12, 22, 37, .... After finding a formula here, compare to part (a).