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A115915 Numbers k such that k + phi(k) 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
EXAMPLE
295 + phi(295) = 527 = 17*31.
CROSSREFS
Sequence in context: A369981 A189136 A116026 * A007536 A209887 A064801
KEYWORD
nonn,base
AUTHOR
Giovanni Resta, Feb 06 2006
STATUS
approved

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Last modified February 23 17:43 EST 2024. Contains 370283 sequences. (Running on oeis4.)