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%I A291754 #6 Aug 31 2017 23:03:32
%S A291754 1,3,7,15,30,61,123,247,495,991,1983,3967,7934,15869,31739,63479,
%T A291754 126959,253919,507839,1015678,2031357,4062715,8125431,16250863,
%U A291754 32501727,65003455,130006911,260013822,520027645,1040055291,2080110583,4160221167
%N A291754 a(n) is the length of stage n in A137844.
%F A291754 a(1) = 1; for n > 1, a(n) = 2*a(n-1) + (A137844(n-1) mod 2).
%o A291754 (Scheme) ;; Use the program given in A137844.
%Y A291754 Cf. A137844, A291753.
%K A291754 nonn
%O A291754 1,2
%A A291754 _Antti Karttunen_, Aug 31 2017

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