id:A102393 - OEIS Search Results

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A wicked evil sequence.

+0
10

1, 0, 0, 4, 0, 6, 7, 0, 0, 10, 11, 0, 13, 0, 0, 16, 0, 18, 19, 0, 21, 0, 0, 24, 25, 0, 0, 28, 0, 30, 31, 0, 0, 34, 35, 0, 37, 0, 0, 40, 41, 0, 0, 44, 0, 46, 47, 0, 49, 0, 0, 52, 0, 54, 55, 0, 0, 58, 59, 0, 61, 0, 0, 64, 0, 66, 67, 0, 69, 0, 0, 72, 73, 0, 0, 76, 0, 78, 79, 0, 81, 0, 0, 84, 0, 86 (list; graph; listen)

	OFFSET	`0,4`
	COMMENT	`Elements of A026147 (evil numbers plus one) appear at positions indexed by the evil numbers A001969, 0 otherwise. A000027(n)=A102393(n)+A102394(n).` `Comment from Jeremy Gardiner, Dec 28 2008: The following sequences all appear to have the same parity: A003071, A029886, A061297, A092524, A093431, A102393, A104258, A122248, A128975.`
	FORMULA	`a(n)=(n+1)(1+(-1)^A000120(n))/2; a(n)=(n+1)(1+(-1)^A010060(n))/2.`
	CROSSREFS	`Cf. A102391.` `Sequence in context: A019629 A073759 A066760 this_sequence A019833 A155743 A027857` `Adjacent sequences: A102390 A102391 A102392 this_sequence A102394 A102395 A102396`
	KEYWORD	`easy,nonn`
	AUTHOR	`Paul Barry (pbarry(AT)wit.ie), Jan 06 2005`

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Last modified November 27 14:50 EST 2009. Contains 167570 sequences.

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