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A323539 Number of distinct sets of lengths of squares that are prefixes of a length-n binary word. 1
1, 2, 2, 4, 4, 7, 7, 11, 11, 17, 17, 25, 25, 36, 36, 50, 50, 68, 68, 90, 90, 121, 121, 154, 154, 200, 200, 256, 256, 319, 319, 395, 395, 494, 494, 599, 599 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

COMMENTS

A square is a nonempty block of the form XX, where X is any block.

LINKS

Table of n, a(n) for n=1..37.

Rémy Sigrist, C++ program for A323539

EXAMPLE

For n = 5, the possible sets are {2,4} (for 0000); {2} (for 0011); {4} (for 0101); and the empty set.

PROG

(C++) See Links section.

CROSSREFS

Similar to, but not the same as A277133.

Sequence in context: A099770 A099383 A277133 * A280954 A197122 A064410

Adjacent sequences:  A323536 A323537 A323538 * A323540 A323541 A323542

KEYWORD

nonn,more

AUTHOR

Jeffrey Shallit, Jan 17 2019

EXTENSIONS

a(22)-a(37) from Rémy Sigrist, Jan 19 2019

STATUS

approved

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Last modified April 24 00:02 EDT 2019. Contains 322404 sequences. (Running on oeis4.)