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%I #7 Jan 27 2024 10:35:52
%S 0,0,1,2,5,14,44,139,475,1658,6146,23495,93840,385956,1643862,7193783,
%T 32446635,150049734,712619582,3462870079
%N a(n) = number of Yamanouchi words of length n that start with 3.
%Y Column 3 in A369588.
%Y Cf. A000085, A238124, A369591.
%K nonn,more
%O 1,4
%A _Max Alekseyev_, Jan 26 2024