id:A103448 - OEIS Search Results

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a(n)=sum(mobius(binom(n,k)), k=0..n).

+0
3

1, 2, 1, 0, 3, 2, 6, 4, 1, 2, 6, 4, 0, -6, 8, 6, 2, -2, 2, -4, 4, 10, 4, 8, 0, 4, 8, 2, 4, 0, -2, -4, 2, 4, 0, 4, 2, -4, 10, 4, 0, -8, 6, -2, 4, -4, 8, 2, 2, 2, 2, 4, 6, 2, 0, 6, 2, 2, 2, -6, 0, 6, 4, 8, 2, 4, 2, 0, 0, 8, -4, -2, 2, 4, 2, 0, -2, 14, 10, -2, 2, 2, 4, 2, 4, -2, 0, 8, 4, 2, 2, -2, 6, 0, -6, 14, 2, 0, 2, 2, 2, 4, 0, 2, -2 (list; graph; listen)

	OFFSET	`0,2`
	COMMENT	`Row sums of A103447.`
	FORMULA	`a(n)=sum(mobius(binom(n, k)), k=0..n).`
	EXAMPLE	`a(4)=3 because mobius(1)+mobius(4)+mobius(6)+mobius(4)+mobius(1)=1+0+1+0+1=3.`
	CROSSREFS	`Cf. A103447, A103449.` `Sequence in context: A058604 A072661 A103432 this_sequence A078803 A130403 A130402` `Adjacent sequences: A103445 A103446 A103447 this_sequence A103449 A103450 A103451`
	KEYWORD	`sign`
	AUTHOR	`Emeric Deutsch (deutsch(AT)duke.poly.edu), Feb 07 2005`

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Last modified December 17 23:40 EST 2009. Contains 171025 sequences.

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