id:A091685 - OEIS Search Results

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Sieve out 6n+/-1.

+0
1

0, 1, 0, 0, 0, 5, 0, 7, 0, 0, 0, 11, 0, 13, 0, 0, 0, 17, 0, 19, 0, 0, 0, 23, 0, 25, 0, 0, 0, 29, 0, 31, 0, 0, 0, 35, 0, 37, 0, 0, 0, 41, 0, 43, 0, 0, 0, 47, 0, 49, 0, 0, 0, 53, 0, 55, 0, 0, 0, 59, 0, 61, 0, 0, 0, 65, 0, 67, 0, 0, 0, 71, 0, 73, 0, 0, 0, 77, 0, 79, 0, 0, 0, 83, 0, 85, 0, 0, 0, 89, 0 (list; graph; listen)

	OFFSET	`0,6`
	COMMENT	`Completely multiplicative with a(2) = a(3) = 0, a(p) = p otherwise. David W. Wilson (davidwwilson(AT)comcast.net) Jun 12, 2005.`
	FORMULA	`a(n)=-product{k=0..5, sum{j=1..n, w(6)^(kj) }}, w(6)=e^(2pii/6), i=sqrt(-1)`
	CROSSREFS	`Cf. A054500.` `Sequence in context: A096287 A098403 A069206 this_sequence A062824 A134828 A070595` `Adjacent sequences: A091682 A091683 A091684 this_sequence A091686 A091687 A091688`
	KEYWORD	`easy,nonn,mult`
	AUTHOR	`Paul Barry (pbarry(AT)wit.ie), Jan 28 2004`

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Last modified August 19 23:53 EDT 2008. Contains 142930 sequences.

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