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Number of elements of size n in the Ulam set in the canonical free group on two starting members, U({0,1}), generated by the two initial members.
0

%I #16 Oct 28 2023 11:40:51

%S 0,2,2,4,8,12,26,36,98,124,274,512,1018,1916,3812,7772,14822,29368,

%T 58478,114300,225166,441724,876238,1717748,3406884

%N Number of elements of size n in the Ulam set in the canonical free group on two starting members, U({0,1}), generated by the two initial members.

%H Tej Bade, Kelly Cui, Antoine Labelle, and Deyuan Li, <a href="https://arxiv.org/abs/2008.02762">Ulam sets in new settings</a>, arXiv:2008.02762 [math.CO], 2020. See also <a href="http://math.colgate.edu/~integers/u102/u102.pdf">Integers</a> (2020) Vol. 20, #A102.

%Y Cf. A336528.

%K nonn,word,more

%O 0,2

%A _Deyuan Li_, Aug 24 2020