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A370729
a(n) is the number of distinct length-n blocks occurring in the characteristic sequence of A228082.
0
1, 2, 3, 5, 8, 11, 17, 24, 35, 51, 71
OFFSET
0,2
COMMENTS
The characteristic sequence is the sequence (b(n)) where b(n) = 1 if n occurs in A228082, and 0 otherwise. The number of distinct length-n blocks is also called the "factor complexity" or "subword complexity" of (b(n)).
EXAMPLE
For n = 4, the only blocks that occur are {0101, 0110, 0111, 1010, 1011, 1101, 1110, 1111}, so a(4) = 8.
CROSSREFS
Cf. A228082.
Sequence in context: A131787 A091498 A227562 * A000511 A263710 A135908
KEYWORD
nonn,base,more,hard
AUTHOR
Jeffrey Shallit, Feb 28 2024
STATUS
approved