id:A105569 - OEIS Search Results

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Diagonal sums of A105567, as a number triangle.

+0
2

1, 1, 2, 0, 3, 3, 2, 2, 0, 1, 2, 0, 0, -1, 2, 2, 2, -3, 2, 2, 4, -1, 2, 0, 2, 1, 2, -1, 2, -2, 2, 3, 8, 0, 2, -1, 4, 0, 2, 3, 4, -1, 2, 2, 6, -4, 2, 3, 6, 4, 2, -2, 2, -2, 2, 4, 4, -1, 2, 4, 6, 9, 2, -1, 0, -3, 2, -4, 6, 0, 2, 3, 12, 9, 2, -1, -6, -6, 2, 2, 6, 4, 2, 6, 8, 0, 2, 1, 0, 0, 2, 6, 0, -6, 2, 5, 8, 0, 2, 3, 4 (list; graph; listen)

	OFFSET	`0,3`
	FORMULA	`a(n)=sum{k=0..floor(n/2), -mu(k(n-2k))}`
	CROSSREFS	`Adjacent sequences: A105566 A105567 A105568 this_sequence A105570 A105571 A105572` `Sequence in context: A134409 A094067 A094112 this_sequence A068455 A038073 A046667`
	KEYWORD	`easy,sign`
	AUTHOR	`Paul Barry (pbarry(AT)wit.ie), Apr 14 2005`

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Last modified October 7 14:39 EDT 2008. Contains 144666 sequences.

AT&T Labs Research