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A241210 Number of binary strings of length n having a factorization as a concatenation of palindromes of length at least 2. 2
0, 2, 4, 6, 20, 32, 88, 162, 360, 758, 1564, 3290, 6692, 13898, 28356, 57954, 117948, 239378, 485472, 981374, 1982324, 3997004, 8051432, 16201164, 32570108, 65431734, 131358932, 263572810, 528600668, 1059691960 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

LINKS

Table of n, a(n) for n=1..30.

EXAMPLE

a(4) = 6 because {0000,0011,0110,1001,1100,1111} are factorable into palindromes of length >= 2.

CROSSREFS

Cf. A241208, A241211.

Sequence in context: A108439 A245766 A193774 * A176652 A251724 A273522

Adjacent sequences:  A241207 A241208 A241209 * A241211 A241212 A241213

KEYWORD

nonn,more

AUTHOR

Jeffrey Shallit, Apr 17 2014

EXTENSIONS

a(17)-a(30) from Giovanni Resta, Apr 18 2014

STATUS

approved

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Last modified June 25 12:55 EDT 2019. Contains 324352 sequences. (Running on oeis4.)