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A050189 T(n,4), array T as in A050186; a count of aperiodic binary words. 0
0, 5, 12, 35, 64, 126, 200, 330, 480, 715, 980, 1365, 1792, 2380, 3024, 3876, 4800, 5985, 7260, 8855, 10560, 12650, 14872, 17550, 20384, 23751, 27300, 31465, 35840, 40920, 46240, 52360, 58752, 66045, 73644, 82251, 91200 (list; graph; refs; listen; history; text; internal format)
OFFSET

4,2

LINKS

Table of n, a(n) for n=4..40.

FORMULA

Seems to be n * A006918.

From Chai Wah Wu, Jun 11 2016: (Start)

a(n) = 2*a(n-1) + 2*a(n-2) - 6*a(n-3) + 6*a(n-5) - 2*a(n-6) - 2*a(n-7) + a(n-8) for n > 11 (conjectured).

G.f.: x^5*(5 + 2*x + x^2)/((1 - x)^5*(1 + x)^3) (conjectured). (End)

CROSSREFS

Cf. A006918, A050186.

Sequence in context: A292104 A136113 A298992 * A308344 A116995 A032281

Adjacent sequences:  A050186 A050187 A050188 * A050190 A050191 A050192

KEYWORD

nonn

AUTHOR

Clark Kimberling

STATUS

approved

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Last modified August 3 01:53 EDT 2021. Contains 346429 sequences. (Running on oeis4.)