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A160620 Sum_{d|n} phi(n/d)^2*2^d. 0
0, 2, 6, 16, 28, 64, 96, 200, 320, 616, 1152, 2248, 4304, 8480, 16728, 33152, 66048, 131584, 263160, 524936, 1050176, 2098240, 4196952, 8389576, 16782976, 33555744, 67117920, 134220712, 268453360, 536872480, 1073780352, 2147485448, 4295034880, 8589944384 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,2

LINKS

Table of n, a(n) for n=0..33.

CROSSREFS

Cf. A053635.

Sequence in context: A085226 A071522 A192532 * A005996 A192735 A218212

Adjacent sequences:  A160617 A160618 A160619 * A160621 A160622 A160623

KEYWORD

nonn

AUTHOR

N. J. A. Sloane, Nov 21 2009

STATUS

approved

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Last modified May 25 00:47 EDT 2013. Contains 225631 sequences.