A102394 - OEIS

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A102394

A wicked odious sequence.

0, 2, 3, 0, 5, 0, 0, 8, 9, 0, 0, 12, 0, 14, 15, 0, 17, 0, 0, 20, 0, 22, 23, 0, 0, 26, 27, 0, 29, 0, 0, 32, 33, 0, 0, 36, 0, 38, 39, 0, 0, 42, 43, 0, 45, 0, 0, 48, 0, 50, 51, 0, 53, 0, 0, 56, 57, 0, 0, 60, 0, 62, 63, 0, 65, 0, 0, 68, 0, 70, 71, 0, 0, 74, 75, 0, 77, 0, 0, 80, 0, 82, 83, 0, 85, 0 (list; graph; refs; listen; history; internal format)

	OFFSET	`0,2`
	COMMENTS	`Odious numbers plus one (A000069(n)+1) appear at positions indexed by the odious numbers, 0 otherwise. A000027(n)=A102393(n)+A102394(n).`
	FORMULA	`a(n)=(n+1)(1-(-1)^A000120(n))/2; a(n)=(n+1)(1-(-1)^A010060(n))/2.`
	CROSSREFS	`Cf. A102392.` `Sequence in context: A121598 A140326 A126436 * A085563 A071375 A061397` `Adjacent sequences: A102391 A102392 A102393 * A102395 A102396 A102397`
	KEYWORD	`easy,nonn`
	AUTHOR	`Paul Barry (pbarry(AT)wit.ie), Jan 06 2005`

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Last modified February 16 09:00 EST 2012. Contains 205904 sequences.