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A330324 a(n) = Sum_{i=1..n} Moebius(i)*Moebius(i+1), where Moebius(n) = A008683(n). 1
-1, 0, 0, 0, -1, -2, -2, -2, -2, -3, -3, -3, -4, -3, -3, -3, -3, -3, -3, -3, -2, -3, -3, -3, -3, -3, -3, -3, -2, -1, -1, -1, 0, 1, 1, 1, 0, 1, 1, 1, 2, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 3, 2, 2, 2, 1, 1, 1, 1, 0, 1, 1, 1, 0, 1, 1, 1, 0, 0, 0, 0, -1, 0, 0, 0, 0, -1, -1, -1, 0, 1, 1 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,6

LINKS

Table of n, a(n) for n=1..87.

CROSSREFS

Partial sums of A330323.

Cf. A008683.

Sequence in context: A054893 A090617 A053693 * A291309 A280472 A068063

Adjacent sequences:  A330321 A330322 A330323 * A330325 A330326 A330327

KEYWORD

sign

AUTHOR

N. J. A. Sloane, Dec 12 2019

STATUS

approved

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Last modified September 23 09:03 EDT 2020. Contains 337298 sequences. (Running on oeis4.)