id:A161217 - OEIS Search Results

Search: id:A161217

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Sum_{d|n} phi(n/d)^2*2^(d+1).

+0
4

0, 4, 12, 32, 56, 128, 192, 400, 640, 1232, 2304, 4496, 8608, 16960, 33456, 66304, 132096, 263168, 526320, 1049872, 2100352, 4196480, 8393904, 16779152, 33565952, 67111488, 134235840, 268441424, 536906720, 1073744960, 2147560704, 4294970896, 8590069760 (list; graph; listen)

	OFFSET	`0,2`
	CROSSREFS	`Cf. A053635.` `Adjacent sequences: A161214 A161215 A161216 this_sequence A161218 A161219 A161220`
	KEYWORD	`nonn,new`
	AUTHOR	`N. J. A. Sloane (njas(AT)research.att.com), Nov 21 2009`

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Last modified December 18 21:37 EST 2009. Contains 171024 sequences.

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