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Tridecagonal Number | Function to find N - th tridecagonal number.
Formula to calculate nth tridecagonal number.
Driver Code"
How can the above be solved in Python?
 Give me a code to tridecagonal Number and the other steps required?
assistant
#Here is code to tridecagonal Number and the other steps required.
 def Tridecagonal_num ( n ) :
	return ( 11 * n * n - 9 * n ) / 2
n = 3
print ( int ( Tridecagonal_num ( n ) ) )
n = 10
print ( int ( Tridecagonal_num ( n ) ) )