A116046 - OEIS

The OEIS is supported by the many generous donors to the OEIS Foundation.

A116046

n+phi(n)+phi(phi(n)) is a semiprime (A001358).

1

2, 3, 6, 7, 8, 11, 14, 18, 23, 27, 29, 31, 34, 37, 38, 42, 45, 47, 53, 55, 59, 63, 65, 66, 69, 73, 74, 83, 89, 90, 91, 93, 103, 105, 107, 109, 110, 117, 119, 123, 125, 127, 129, 130, 131, 138, 139, 143, 145, 150, 151, 157, 167, 174, 175, 179, 182, 183, 185, 186

(list; graph; refs; listen; history; text; internal format)

OFFSET

1,1

LINKS

Table of n, a(n) for n=1..60.

EXAMPLE

103+phi(103)+phi(phi(103)) = 3*79.

CROSSREFS

Cf. A001358, A116045.

Sequence in context: A304028 A155152 A098740 * A069579 A327176 A065193

Adjacent sequences: A116043 A116044 A116045 * A116047 A116048 A116049

KEYWORD

nonn

AUTHOR

Giovanni Resta, Feb 13 2006

STATUS

approved