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Search: id:A092245
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| A092245 |
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Lesser of the first twin prime pair with n digits. |
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+0
1
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| 3, 11, 101, 1019, 10007, 100151, 1000037, 10000139, 100000037, 1000000007, 10000000277, 100000000817, 1000000000061, 10000000001267, 100000000000097, 1000000000002371, 10000000000001549, 100000000000000019
(list; graph; listen)
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OFFSET
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1,1
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COMMENT
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Sum of reciprocals = 0.43523579465477..
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PROGRAM
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(PARI) firsttwpr(n) = { sr=0; for(m=0, n, c=0; for(x=10^m+1, 10^(m+1), if(isprime(x)&& isprime(x+2), print1(x", "); sr+=1./x; break) ) ); print(); print(sr) }
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CROSSREFS
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Sequence in context: A072640 A007616 A121045 this_sequence A105413 A136985 A131546
Adjacent sequences: A092242 A092243 A092244 this_sequence A092246 A092247 A092248
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KEYWORD
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base,nonn
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AUTHOR
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Cino Hilliard (hillcino368(AT)gmail.com), Feb 17 2004
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EXTENSIONS
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Corrected by T. D. Noe (noe(AT)sspectra.com), Nov 15 2006
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