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A116050 n+sigma(n)+sigma(sigma(n)) is a prime. 0
1, 4, 5, 8, 10, 16, 18, 22, 23, 27, 29, 32, 36, 41, 46, 50, 53, 65, 66, 70, 94, 99, 101, 106, 111, 113, 125, 129, 131, 137, 171, 183, 195, 197, 200, 201, 203, 209, 210, 221, 233, 237, 239, 245, 251, 269, 275, 299, 301, 309, 317, 321, 322, 327, 329, 333, 335 (list; graph; refs; listen; history; internal format)
OFFSET

1,2

EXAMPLE

8 + sigma(8) + sigma(sigma(8)) = 47.

CROSSREFS

Cf. A078762.

Sequence in context: A139132 A022435 A190394 * A056721 A057479 A050140

Adjacent sequences:  A116047 A116048 A116049 * A116051 A116052 A116053

KEYWORD

nonn

AUTHOR

Giovanni Resta (g.resta(AT)iit.cnr.it), Feb 13 2006

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Last modified February 16 21:30 EST 2012. Contains 205971 sequences.