In the Q-sequence, Q(n) is defined as Q(n−Q(n−1))+Q(n−Q(n−2)) (with terms n=1 and n=2 set to 1). So Q(3)=Q(3−1)+Q(3−1)=2, and so on. This sequence “dies” if Q(n)>n for any n, because then the next term would ask for some term like Q(−1) which is undefined. We don’t know whether the Q-sequence dies or not.
Maybe anything about Hofstadter’s Q-sequence.
In the Q-sequence, Q(n) is defined as Q(n−Q(n−1))+Q(n−Q(n−2)) (with terms n=1 and n=2 set to 1). So Q(3)=Q(3−1)+Q(3−1)=2, and so on. This sequence “dies” if Q(n)>n for any n, because then the next term would ask for some term like Q(−1) which is undefined. We don’t know whether the Q-sequence dies or not.