A116052 Numbers k such that k + sigma(k) + sigma(sigma(k)) is a brilliant number (A078972).

2, 3, 57, 63, 64, 83, 85, 91, 98, 133, 141, 145, 149, 154, 156, 187, 189, 232, 247, 249, 255, 263, 279, 281, 293, 310, 319, 415, 419, 425, 467, 512, 575, 589, 593, 653, 791, 799, 813, 837, 839, 970, 1019, 1103, 1113, 1145, 1247, 1259, 1427, 2183, 2223

Offset: 1

Author

Giovanni Resta, Feb 13 2006

Keywords

• nonn
• base

Examples

			1103 is in the sequence since 1103 + sigma(1103) + sigma(sigma(1103)) = 71*73 (a brilliant number).
		

Crossrefs

Cf. A078972 (brilliant numbers), A116051.