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Search: id:A037172
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| A037172 |
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Numbers n such that sigma(n)-n = {number of primes <= n}. |
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+0
3
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| 1, 2, 9, 85, 2569, 2723, 2807, 174449, 1302379, 8513821, 10518107, 14348051, 70110091, 70111621, 70112369, 10910880311, 43908943297
(list; graph; listen)
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OFFSET
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1,2
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COMMENT
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Next term > 300000000. - Kok Seng Chua (chuaks(AT)ihpc.nus.edu.sg), Apr 09 2002
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CROSSREFS
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Sequence in context: A125797 A106163 A068595 this_sequence A135747 A132431 A001192
Adjacent sequences: A037169 A037170 A037171 this_sequence A037173 A037174 A037175
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KEYWORD
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nonn,more
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AUTHOR
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Naohiro Nomoto (6284968128(AT)geocities.co.jp)
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EXTENSIONS
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More terms from Kok Seng Chua (chuaks(AT)ihpc.nus.edu.sg), Apr 09 2002
a(16)-a(17) from Donovan Johnson (donovan.johnson(AT)yahoo.com), Sep 03 2008
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