Question

Find the first 5 terms of the sequence: a1=1, an=4an-1-1

Answer 1

multiply by 4, subtract 1
so for example
\[a_2=4\times a_1-1=4\times 1-1=4-1=3\]

Answer 2

and
\[a_3=4\times a_2-1=4\times 3-1=12-1=11\]