A320581 - OEIS

%I #7 Oct 18 2018 03:07:07

%S 2,1,2,3,4,3,4,5,6,5,6,7,8,9,10

%N a(n) is the number of closed factors of length n in the Fibonacci word.

%H Olga Parshina, Luca Zamboni, <a href="https://arxiv.org/abs/1810.05472">Open and closed factors of Arnoux-Rauzy words</a>, arXiv:1810.05472 [math.CO], 2018. See Example 2.7 p. 7.

%Y Cf. A003849 (Fibonacci word).

%K nonn,more

%O 1,1

%A _Michel Marcus_, Oct 16 2018