## jesusfreak Group Title Find the first 5 terms of the sequence: a1=1, an=4an-1-1 2 years ago 2 years ago

multiply by 4, subtract 1 so for example $a_2=4\times a_1-1=4\times 1-1=4-1=3$
and $a_3=4\times a_2-1=4\times 3-1=12-1=11$