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A115915 Numbers n such that n+phi(n) is a brilliant number (A078972). 1
4, 5, 9, 10, 11, 13, 61, 87, 127, 181, 241, 253, 265, 287, 295, 321, 323, 349, 361, 363, 377, 397, 407, 409, 421, 451, 457, 473, 481, 485, 511, 515, 527, 537, 541, 581, 595, 631, 635, 671, 695, 705, 721, 731, 751, 757, 763, 769, 793, 805, 807, 843, 851, 867 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

LINKS

Table of n, a(n) for n=1..54.

EXAMPLE

295+phi(295)=527=17*31.

CROSSREFS

Cf. A078972, A115916.

Sequence in context: A120516 A189136 A116026 * A007536 A209887 A064801

Adjacent sequences:  A115912 A115913 A115914 * A115916 A115917 A115918

KEYWORD

nonn,base

AUTHOR

Giovanni Resta, Feb 06 2006

STATUS

approved

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Last modified July 4 16:24 EDT 2020. Contains 335448 sequences. (Running on oeis4.)