id:A059723 - OEIS Search Results

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Mean of first 2^n nonnegative powers of 3, i.e. (1+3+3^2+...+3^(2^n-1))/2^n.

+0
6

1, 2, 10, 410, 1345210, 28953440450810, 26825654846035253786389446010, 46055408506791340513753409614892651037805514032327504332410 (list; graph; listen)

	OFFSET	`0,2`
	FORMULA	`a(n) =(3^(2^n)-1)/2^(n+1)`
	EXAMPLE	`a(3)=(1+3+9+27+81+243+729+2187)/8=3280/8=410`
	CROSSREFS	`Cf. A059721, A059722.` `Sequence in context: A015178 A058311 A013034 this_sequence A112449 A011824 A064300` `Adjacent sequences: A059720 A059721 A059722 this_sequence A059724 A059725 A059726`
	KEYWORD	`nonn`
	AUTHOR	`Henry Bottomley (se16(AT)btinternet.com), Feb 07 2001`

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Last modified August 19 23:53 EDT 2008. Contains 142930 sequences.

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