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A116052 Numbers k such that k + sigma(k) + sigma(sigma(k)) is a brilliant number (A078972). 0
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 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

LINKS

Table of n, a(n) for n=1..51.

EXAMPLE

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

CROSSREFS

Cf. A078972 (brilliant numbers), A116051.

Sequence in context: A041709 A179281 A000656 * A141509 A054313 A080052

Adjacent sequences:  A116049 A116050 A116051 * A116053 A116054 A116055

KEYWORD

nonn,base

AUTHOR

Giovanni Resta, Feb 13 2006

STATUS

approved

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Last modified May 23 01:52 EDT 2022. Contains 353959 sequences. (Running on oeis4.)