Abs((- one + three ^n)*factorial(one + n)/((- one + three ^(one + n))*factorial(n)))
Abs(( minus 1 plus 3 to the power of n) multiply by factorial(1 plus n) divide by (( minus 1 plus 3 to the power of (1 plus n)) multiply by factorial(n)))
Abs(( minus one plus three to the power of n) multiply by factorial(one plus n) divide by (( minus one plus three to the power of (one plus n)) multiply by factorial(n)))