B(n)=1(−2) n−1
b, left parenthesis, n, right parenthesis, equals, 1, left parenthesis, minus, 2, right parenthesis, start superscript, n, minus, 1, end superscript
What is the 4^\text{th}4
th
4, start superscript, start text, t, h, end text, end superscript term in the sequence?