The output \(\rm y [n]\) of a causal system is given by z-transform

\(\rm Y\left( z \right) = \frac{1}{{1 - 10{z^{ - 1}} + 25{z^{ - 2}} - 30{z^{ - 3}} + 24{z^{ - 4}}}}\)

The sum of the first three non zero terms of sequence y(n) is __________.