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A161217 Sum_{d|n} phi(n/d)^2*2^(d+1). 3
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; refs; listen; history; internal format)
OFFSET

0,2

CROSSREFS

Cf. A053635.

Sequence in context: A133546 A190376 A171844 * A152527 A005104 A028921

Adjacent sequences:  A161214 A161215 A161216 * A161218 A161219 A161220

KEYWORD

nonn

AUTHOR

N. J. A. Sloane (njas(AT)research.att.com), Nov 21 2009

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Last modified February 17 23:08 EST 2012. Contains 206085 sequences.