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Search: id:A106042
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| A106042 |
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Numbers n such that n*prime(n)-2 is a perfect square. |
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+0
1
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OFFSET
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1,2
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COMMENT
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Next term after 3905394 is greater than 2*10^9. - Ryan Propper (rpropper(AT)stanford.edu), Jun 26 2005
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EXAMPLE
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1*2-2=0^2
2*3-2=2^2
51*233-2=109^2
402*2753-2=1052^2
1506*12611-2=4358^2
18258*203387-2=60938^2
3905394*66166537-2 = 16075024^2
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CROSSREFS
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Sequence in context: A037419 A078165 A037058 this_sequence A089304 A099368 A132492
Adjacent sequences: A106039 A106040 A106041 this_sequence A106043 A106044 A106045
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KEYWORD
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more,nonn
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AUTHOR
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Zak Seidov (zakseidov(AT)yahoo.com), May 06 2005
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EXTENSIONS
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3905394 from Ryan Propper (rpropper(AT)stanford.edu), Jun 26 2005
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