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Search: id:A124013
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| A124013 |
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Lesser of pair of most widely separated primes whose sum is 10^n. |
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+0
3
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| 5, 3, 59, 11, 17, 29, 11, 71, 71, 23, 11, 29, 29, 11, 83, 3, 11, 281, 11, 101, 71, 23, 257, 401, 293, 107, 293, 53, 11, 113, 251, 47, 587, 23, 179, 389, 59, 173, 17, 1427, 83, 431, 53, 563, 593, 41, 47, 239, 383, 431, 1181, 701, 971, 149, 593, 569, 149, 191, 1973
(list; graph; listen)
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OFFSET
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1,1
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FORMULA
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10^n - a(n) is prime.
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EXAMPLE
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10^1 = 5 + 5, 10^2 = 3 + 97, 10^3 = 3 + 997, 10^4 = 59 + 9941, 10^5 = 11 + 99989, 10^6 = 17 + 999983, 10^7 = 29 + 9999971, 10^8 = 11 + 99999989, 10^9 = 71 + 999999929, 10^10 = 23 + 9999999977, etc.
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CROSSREFS
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Cf. A065577 Number of Goldbach partitions of 10^n, A124450 Lesser of pair of closest primes summed to 10^n.
Sequence in context: A111108 A038245 A027858 this_sequence A007299 A109254 A145985
Adjacent sequences: A124010 A124011 A124012 this_sequence A124014 A124015 A124016
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KEYWORD
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nonn
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AUTHOR
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Zak Seidov (zakseidov(AT)yahoo.com), Nov 02 2006
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