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Search: id:A077129
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| A077129 |
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Smallest number which is relatively prime to all the numbers between successive odd primes. |
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+0
2
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| 3, 5, 7, 5, 11, 5, 13, 11, 7, 13, 7, 5, 7, 11, 13, 7, 17, 11, 5, 17, 7, 13, 11, 13, 5, 11, 5, 13, 37, 7, 13, 5, 17, 7, 23, 11, 7, 11, 13, 7, 29, 5, 11, 5, 31, 19, 11, 5, 13, 11, 7, 17, 13, 11, 13, 7, 19, 11, 5, 23, 29, 13, 5, 11, 31, 11, 29, 5, 17, 11, 17, 11, 19, 7, 13, 19, 11
(list; graph; listen)
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OFFSET
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0,1
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COMMENT
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Naturally every member is a prime.
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EXAMPLE
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a(5)= 11,is the smallest number coprime to all the numbers from 13 to 17 i.e. 14,15 and 16.
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PROGRAM
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(PARI) for(n=2, 100, for(i=2, 10^9, f=0:for(k=prime(n)+1, nextprime(prime(n)+1)-1, if(gcd(i, k)>1, f=1:break)): if(!f, print1(i", "):break)))
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CROSSREFS
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Sequence in context: A070949 A141574 A141261 this_sequence A073409 A151548 A071581
Adjacent sequences: A077126 A077127 A077128 this_sequence A077130 A077131 A077132
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KEYWORD
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nonn
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AUTHOR
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Amarnath Murthy (amarnath_murthy(AT)yahoo.com), Oct 29 2002
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EXTENSIONS
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More terms from Ralf Stephan (ralf(AT)ark.in-berlin.de), Mar 27 2003
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