id:A048643 - OEIS Search Results

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Differences between partial products of Gray code (A048642) and factorials (A000142).

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0, 0, 1, 0, 12, 132, 540, 0, 20160, 423360, 8164800, 125193600, 1172102400, 11935123200, 76281004800, 0, 10461394944000, 428917192704000, 14781951055872000, 429147343392768000, 14090871305871360000 (list; graph; listen)

	OFFSET	`0,5`
	COMMENT	`a((2^n)-1) = 0 for all n.`
	FORMULA	`a(0) = 0, a(n) = product(XORnos(j, floor(j/2)), j=1..n)-n!`
	CROSSREFS	`Cf. A048644.` `Sequence in context: A160962 A097783 A078218 this_sequence A111085 A002721 A119217` `Adjacent sequences: A048640 A048641 A048642 this_sequence A048644 A048645 A048646`
	KEYWORD	`easy,nonn`
	AUTHOR	`Antti Karttunen, Jul 14 1999`

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Last modified November 23 17:09 EST 2009. Contains 167438 sequences.

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