The Lucas numbers L_n are given by the recursion L_0=2, L_1=1 and L_n=L_n-1+L_n-2. Find the units digit of L_L_10.
Hello, anyone?
I checked by computer, and the last digit is 6.
See here: A000032 in the OEIS: The First 10 Lucas' numbers are:
2, 1 , 3 , 4 , 7 , 11 , 18 , 29 , 47 , 76
+117 
