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Search: id:A064440
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| A064440 |
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A048138(n) is a prime and sets a new record for such primes. |
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+0
2
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OFFSET
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1,1
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LINKS
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Matthew M. Conroy, Home page (listed instead of email address)
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PROGRAM
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(PARI) f(n) = s=0; for(x=1, n^2, if(sigma(x)-x==n, s++)); s; a=0; for(n=1, 10^5, x=f(n); if(isprime(x), b=x; if(b>a, a=b; print(n))))
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CROSSREFS
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Sequence in context: A132184 A143322 A034897 this_sequence A106634 A063126 A115702
Adjacent sequences: A064437 A064438 A064439 this_sequence A064441 A064442 A064443
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KEYWORD
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nonn
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AUTHOR
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Jason Earls (zevi_35711(AT)yahoo.com), Oct 01 2001
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EXTENSIONS
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Corrected and extended by Matthew M. Conroy, Oct 02 2001
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