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A096505 Primes of [1+repdigit] form. Primes whose totient is repdigit. 2
3, 5, 7, 23, 67, 89, 223, 666667, 22222223, 66666667, 666666667, 22222222223, 66666666667, 88888888888889, 88888888888888889, 66666666666666666667, 66666666666666666666667, 88888888888888888888888888888888889 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

LINKS

Table of n, a(n) for n=1..18.

EXAMPLE

n=89 prime, its totient=88 is a decimal repdigit.

CROSSREFS

Cf. A096503, A096504, A000010.

Sequence in context: A288890 A120384 A216124 * A214680 A141802 A029846

Adjacent sequences:  A096502 A096503 A096504 * A096506 A096507 A096508

KEYWORD

base,nonn

AUTHOR

Labos Elemer, Jul 12 2004

STATUS

approved

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Last modified October 15 05:43 EDT 2019. Contains 328026 sequences. (Running on oeis4.)