id:A053636 - OEIS Search Results

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

+0
3

0, 2, 4, 12, 16, 40, 72, 140, 256, 540, 1040, 2068, 4128, 8216, 16408, 32880, 65536, 131104, 262296, 524324, 1048640, 2097480, 4194344, 8388652, 16777728, 33554600, 67108912, 134218836, 268435552, 536870968, 1073744160, 2147483708 (list; graph; listen)

	OFFSET	`0,2`
	FORMULA	`a(n) = (n-2) * A063776(n-2).`
	CROSSREFS	`Cf. A053635.` `Sequence in context: A114064 A071118 A132314 this_sequence A054440 A074646 A097001` `Adjacent sequences: A053633 A053634 A053635 this_sequence A053637 A053638 A053639`
	KEYWORD	`nonn`
	AUTHOR	`N. J. A. Sloane (njas(AT)research.att.com), Mar 23 2000`

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Last modified March 17 15:31 EDT 2010. Contains 173524 sequences.

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