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

Author

Giovanni Resta, Feb 06 2006

Keywords

• nonn
• base

Examples

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

Crossrefs

Cf. A078972, A115916.