A116027 Numbers k such that k + phi(k) + phi(phi(k)) is a repdigit.

1, 2, 3, 4, 5, 6, 14, 23, 28, 45, 51, 55, 56, 63, 161, 189, 275, 543, 567, 1373, 13499, 13642, 25963, 27284, 54568, 135347, 138587, 304779, 1296346, 2592692, 5185384, 45994399, 338193377, 419192721, 1492937222, 1724137953, 2453038739, 2985874444, 4687039999

Offset

1,2

Links

Table of n, a(n) for n=1..39.

Example

5185384 + phi(5185384) + phi(phi(5185384)) = 8888888.

Crossrefs

Cf. A010785, A116018.

Sequence in context: A250047 A084830 A116044 * A085157 A065637 A325805

Adjacent sequences: A116024 A116025 A116026 * A116028 A116029 A116030

Keyword

nonn,base

Author

Giovanni Resta, Feb 13 2006

Extensions

a(32)-a(39) from Donovan Johnson, Feb 18 2013

Status

approved