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A114072 Numbers n such that phi(n) + n is a fourth power. 0
12, 41, 172, 176, 192, 313, 385, 972, 1008, 1201, 2732, 2752, 2816, 3072, 6668, 7321, 14281, 15552, 16128, 25616, 29425, 41761, 43696, 43712, 44032, 45056, 49152, 78732, 78768, 79056, 81648, 84240, 97241, 106688, 123921, 139921 (list; graph; refs; listen; history; internal format)
OFFSET

1,1

EXAMPLE

phi(41) + 41 = 81 = 3^4.

CROSSREFS

Sequence in context: A033586 A180093 A137389 * A022672 A109275 A085798

Adjacent sequences:  A114069 A114070 A114071 * A114073 A114074 A114075

KEYWORD

nonn

AUTHOR

Giovanni Resta (g.resta(AT)iit.cnr.it), Feb 13 2006

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Last modified February 16 21:42 EST 2012. Contains 205976 sequences.