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Search: id:A033873
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| A033873 |
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Difference between first prime > 10^n (A003617) and 10^n. |
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+0
20
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| 1, 1, 1, 9, 7, 3, 3, 19, 7, 7, 19, 3, 39, 37, 31, 37, 61, 3, 3, 51, 39, 117, 9, 117, 7, 13, 67, 103, 331, 319, 57, 33, 49, 61, 193, 69, 67, 43, 133, 3, 121, 109, 63, 57, 31, 9, 121, 33, 193, 9, 151, 121, 327, 171, 31, 21, 3, 279, 159, 19, 7, 93, 447, 121, 57, 49, 49, 49, 99, 9
(list; graph; listen)
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OFFSET
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0,4
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LINKS
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T. D. Noe, Table of n, a(n) for n = 0..1000 (yielding probable primes)
V. Danilov, Table for large n
Eric Weisstein's World of Mathematics, Next Prime
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EXAMPLE
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The 23rd term is 117 since 10^23 + 117 = 100000000000000000000117 is prime.
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MAPLE
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seq(nextprime(10^n)-10^n, n=0..70); - Emeric Deutsch (deutsch(AT)duke.poly.edu), Apr 20 2006
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MATHEMATICA
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NextPrime[ n_Integer ] := (k = n + 1; While[ ! PrimeQ[ k ], k++ ]; Return[ k ]); Table[ NextPrime[ 10^n ] - 10^n, {n, 0, 75} ]
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CROSSREFS
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Cf. A003617.
Adjacent sequences: A033870 A033871 A033872 this_sequence A033874 A033875 A033876
Sequence in context: A029688 A091558 A002205 this_sequence A135449 A060388 A081821
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KEYWORD
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nonn,nice
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AUTHOR
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Vasiliy Danilov (danilovv(AT)usa.net)
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EXTENSIONS
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More terms from Patrick De Geest (pdg(AT)worldofnumbers.com)
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