id:A102391 - OEIS Search Results

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Evil numbers in evil places.

+0
3

0, 0, 0, 3, 0, 5, 6, 0, 0, 9, 10, 0, 12, 0, 0, 15, 0, 17, 18, 0, 20, 0, 0, 23, 24, 0, 0, 27, 0, 29, 30, 0, 0, 33, 34, 0, 36, 0, 0, 39, 40, 0, 0, 43, 0, 45, 46, 0, 48, 0, 0, 51, 0, 53, 54, 0, 0, 57, 58, 0, 60, 0, 0, 63, 0, 65, 66, 0, 68, 0, 0, 71, 72, 0, 0, 75, 0, 77, 78, 0, 80, 0, 0, 83, 0, 85 (list; graph; listen)

	OFFSET	`0,4`
	COMMENT	`Evil numbers A001969(n) appear at positions indexed by the evil numbers, 0 otherwise. A001477(n)=A102391(n)+A102392(n).`
	FORMULA	`a(n)=if((1+floor(n/2))(1+(-1)^A000120(n))/2=0, 0, n); a(n)=if((1+floor(n/2))(1+(-1)^A010060(n))/2=0, 0, n).`
	CROSSREFS	`Sequence in context: A159060 A021770 A004589 this_sequence A038556 A052483 A019915` `Adjacent sequences: A102388 A102389 A102390 this_sequence A102392 A102393 A102394`
	KEYWORD	`easy,nonn`
	AUTHOR	`Paul Barry (pbarry(AT)wit.ie), Jan 06 2005`

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Last modified November 29 12:46 EST 2009. Contains 167659 sequences.

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