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Search: id:A051614
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| A051614 |
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4th term in Euclid-Mullin prime sequence started with n-th prime. |
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+0
10
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| 43, 43, 3, 43, 3, 79, 3, 5, 3, 3, 11, 223, 3, 7, 3, 3, 827, 367, 13, 3, 439, 5, 3, 3, 11, 5, 619, 3, 5, 3, 7, 3, 3, 5, 5, 907, 23, 11, 3, 3, 3, 1087, 3, 19, 3, 5, 7, 13, 3, 5, 3, 3, 1447, 3, 3, 3, 3767, 1627, 1663, 3, 1699, 3, 19, 5, 1879, 3, 1987, 7, 3, 5, 4943, 3, 2203, 2239, 5, 23
(list; graph; listen)
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OFFSET
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1,1
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COMMENT
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First term is p(n), 2nd term (if p odd) is 2, 3rd term is A023592.
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FORMULA
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a(n)=F[2p(n)F[2p(n)+1]+1] where F[x] is least prime divisor of x and p(n) is n-th prime
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EXAMPLE
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E.g. (5,2,11,3), (89,2,179,3), (17,2,5,3), (2,3,7,43), (61,2,3,367).
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CROSSREFS
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Cf. A000040, A005384, A005385, A023592, A051308 - A051335.
Sequence in context: A097398 A033363 A127147 this_sequence A165864 A020442 A041923
Adjacent sequences: A051611 A051612 A051613 this_sequence A051615 A051616 A051617
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KEYWORD
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nonn,easy,nice
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AUTHOR
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Labos E. (labos(AT)ana.sote.hu)
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