A115915 Numbers k such that k + phi(k) is a brilliant number (A078972).

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

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: A369981 A189136 A116026 * A007536 A209887 A064801

Adjacent sequences: A115912 A115913 A115914 * A115916 A115917 A115918

Keyword

nonn,base

Author

Giovanni Resta, Feb 06 2006

Status

approved