

A096843


Primes of form repdigit  1. Primes whose sum of divisors is a decimal repdigit.


1



2, 3, 5, 7, 43, 443, 887, 2221, 8887, 444443, 888887, 444444443, 888888887, 444444444443, 888888888887, 222222222222222221, 444444444444444444444444444443, 44444444444444444444444444444443
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OFFSET

1,1


COMMENTS

Union numbers 2, 5 and sequences A093171, A093163 and A091189.
Corresponding values of sigma(a(n)) are in A028987.  Jaroslav Krizek, Mar 19 2013.


LINKS

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


EXAMPLE

n=43:sigma[43]=44;


CROSSREFS

Cf. A096503A096508, A096841A096846, A000203.
Sequence in context: A224904 A028981 A223035 * A052016 A171020 A214179
Adjacent sequences: A096840 A096841 A096842 * A096844 A096845 A096846


KEYWORD

base,nonn


AUTHOR

Labos Elemer, Jul 15 2004


EXTENSIONS

Added missing a(1)=2 and a(3)=5, Jaroslav Krizek, Mar 19 2013


STATUS

approved



