two ^(one + n)* two ^(- two - n)*Abs(factorial(two + n)/factorial(one + n))
2 to the power of (1 plus n) multiply by 2 to the power of ( minus 2 minus n) multiply by Abs(factorial(2 plus n) divide by factorial(1 plus n))
two to the power of (one plus n) multiply by two to the power of ( minus two minus n) multiply by Abs(factorial(two plus n) divide by factorial(one plus n))