id:A014980 - OEIS Search Results

Search: id:A014980

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Start with 5. Multiply two numbers closest to n/2 to get next number.

+0
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5, 6, 9, 20, 100, 2500, 1562500, 610351562500, 93132257461547851562500, 2168404344971008868014905601739883422851562500, 11754943508222875079687365372222456778186655567720875215087517062784172594547271\ 72851562500 (list; graph; listen)

	OFFSET	`0,1`
	FORMULA	`a(0) = 5; a(k+1) = floor(a(k)/2) * ceil(a(k)/2).`
	CROSSREFS	`Sequence in context: A117951 A124519 A154311 this_sequence A066901 A019125 A019205` `Adjacent sequences: A014977 A014978 A014979 this_sequence A014981 A014982 A014983`
	KEYWORD	`nonn,nice,easy`
	AUTHOR	`Colin Sandon (sandon(AT)together.net)`
	EXTENSIONS	`More terms from James A. Sellers (sellersj(AT)math.psu.edu), Feb 05 2000`

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Last modified December 9 14:43 EST 2009. Contains 170430 sequences.

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