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Even numbers in Hofstadter Q-sequence a(n)=a(n-a(n-1))+a(n-a(n-2)).
1

%I #5 Oct 12 2013 15:29:29

%S 2,4,6,6,6,8,8,8,10,10,12,12,12,12,16,14,14,16,16,16,16,20,20,20,22,

%T 22,24,24,24,24,24,32,24,30,28,26,30,30,28,32,30,32,32,32,32,40,38,40,

%U 38,40,40,42,40,44,46,44,46,48,48,48,48,48,48,64,52,54,56,48,54,54,50,60

%N Even numbers in Hofstadter Q-sequence a(n)=a(n-a(n-1))+a(n-a(n-2)).

%Y Cf. A005185.

%K nonn,easy

%O 1,1

%A _Mohammad K. Azarian_

%E More terms from _James A. Sellers_