#### Answer

1, 2, 3, 3, 2, 1

#### Work Step by Step

sequence of numbers would be printed by the following recursive
procedure if we started it with N assigned the value 1
procedure Exercise (N)
print the value of N;
if (N < 3) then (apply the procedure Exercise to the value N + 1);
print the value of N.
1, 2, 3, 3, 2, 1