id:A004395 - OEIS Search Results

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Ratios of successive terms are 1,1,2,3,3,4,5,5,6,7,7,...

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1, 1, 1, 2, 6, 18, 72, 360, 1800, 10800, 75600, 529200, 4233600, 38102400, 342921600, 3429216000, 37721376000, 414935136000, 4979221632000, 64729881216000, 841488455808000, 11780838381312000, 176712575719680000 (list; graph; listen)

	OFFSET	`0,4`
	CROSSREFS	`a(n+1) = a(n) * A004396(n).` `Sequence in context: A060181 A131281 A022491 this_sequence A006388 A007116 A079391` `Adjacent sequences: A004392 A004393 A004394 this_sequence A004396 A004397 A004398`
	KEYWORD	`nonn`
	AUTHOR	`N. J. A. Sloane (njas(AT)research.att.com).`

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Last modified November 25 20:09 EST 2009. Contains 167514 sequences.

AT&T Labs Research