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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 (list; graph; refs; listen; history; text; internal format)
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. A096503-A096508, A096841-A096846, 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

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Last modified September 23 00:13 EDT 2014. Contains 247086 sequences.