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A088950 Number of square-subwords in ternary representation of n. 2
0, 0, 0, 0, 1, 0, 0, 0, 1, 1, 0, 0, 1, 2, 1, 0, 0, 1, 1, 0, 0, 0, 1, 0, 1, 1, 2, 2, 1, 1, 1, 1, 0, 0, 0, 1, 2, 1, 1, 2, 4, 2, 1, 1, 2, 1, 0, 0, 0, 1, 1, 1, 1, 2, 2, 1, 1, 0, 1, 0, 1, 0, 1, 1, 0, 0, 1, 2, 1, 0, 1, 1, 2, 1, 1, 1, 2, 1, 2, 2, 4, 4, 2, 2, 1, 2, 1, 1, 1, 2, 2, 2, 1, 1, 2, 1, 0, 0, 1, 1, 0, 1 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,14

COMMENTS

A square-(sub)word consists of two nonempty identical adjacent subwords.

LINKS

Table of n, a(n) for n=0..101.

Eric Weisstein's World of Mathematics, Squarefree Word

EXAMPLE

n=90: a(90)=2 because 90 -> '10100' has 2 square-subwords: 00 and 1010.

MATHEMATICA

Table[SequenceCount[IntegerDigits[n, 3], {x__, x__}, Overlaps -> All], {n, 0, 100}] (* Vladimir Reshetnikov, May 17 2016 *)

CROSSREFS

Cf. A007089, A088951, A088952.

Sequence in context: A214625 A279278 A015964 * A267113 A083025 A046080

Adjacent sequences:  A088947 A088948 A088949 * A088951 A088952 A088953

KEYWORD

nonn,base

AUTHOR

Reinhard Zumkeller, Oct 25 2003

STATUS

approved

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Last modified June 15 16:13 EDT 2019. Contains 324142 sequences. (Running on oeis4.)