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A105568 Row sums of A105567, as a number triangle. 1
1, 2, 1, 4, 4, 0, 4, -2, 2, 0, 0, 2, 2, 4, 2, -2, -4, 10, 0, 4, 0, 2, -2, 6, -2, 6, 2, 6, 0, 8, -2, 4, 4, 6, -2, 6, -8, 8, 10, 4, -2, 6, -4, 4, 4, 10, 4, -2, -4, 2, 0, 12, 2, 6, -4, 2, 2, 12, 6, 0, -8, -8, 14, 10, 2, 10, -10, 8, 10, 8, -2, 0, -2, -8, 8, 12, 2, 6, -10, 2, 10, 10, 10, -12, -8, 6, 0, 8, 8, 2, -12, -2, 2, 16, 10, 0, -2, 0, 16, 12, 6 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,2

LINKS

Table of n, a(n) for n=0..100.

FORMULA

a(n)=sum{k=0..n, -mu(k(n-k))}

CROSSREFS

Sequence in context: A036069 A009477 A324658 * A335830 A004175 A136756

Adjacent sequences:  A105565 A105566 A105567 * A105569 A105570 A105571

KEYWORD

easy,sign

AUTHOR

Paul Barry, Apr 14 2005

STATUS

approved

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Last modified July 16 11:09 EDT 2020. Contains 335784 sequences. (Running on oeis4.)