Hi. Not sure what the rule is for n10, but perhaps the equation can be
reduced for n <= 10

Place in A1, and copy down to A10.

=(10^ROW()*(9*ROW() - 1) + 325)/81

HTH
Dana DeLouis

= = = = =

Mohamed Rifan wrote:
If,
1=5
2=25
3=325
4=4325
5=?