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A096843
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Primes of form repdigit - 1. Primes whose sum of divisors is a decimal repdigit.
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3
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2, 3, 5, 7, 43, 443, 887, 2221, 8887, 444443, 888887, 444444443, 888888887, 444444444443, 888888888887, 222222222222222221, 444444444444444444444444444443, 44444444444444444444444444444443
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OFFSET
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1,1
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COMMENTS
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Union numbers 2, 5 and sequences A093171, A093163 and A091189.
Corresponding values of sigma(a(n)) are in A028987. - Jaroslav Krizek, Mar 19 2013.
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LINKS
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Table of n, a(n) for n=1..18.
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EXAMPLE
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n=43:sigma[43]=44;
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CROSSREFS
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Cf. A096503-A096508, A096841-A096846, A000203.
Sequence in context: A092066 A028981 A223035 * A052016 A171020 A214179
Adjacent sequences: A096840 A096841 A096842 * A096844 A096845 A096846
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KEYWORD
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base,nonn
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AUTHOR
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Labos E. (labos(AT)ana.sote.hu), Jul 15 2004
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EXTENSIONS
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Added missing a(1)=2 and a(3)=5, Jaroslav Krizek, Mar 19 2013
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STATUS
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approved
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