What is the next in this series A, A, A, A, A, _ ?

Question

Answer 1

Is it 'A' (not sure)

Answer 2

1*(-2)+3=1
1*(-1)+2=1
1*0+1=1
1*1+0=1
1*2-1=1

This series will continue to give same result as 1
Hence every time we will get A as the next term