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A129735
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List of primitive prime divisors of the numbers (4^n-1)/3 (A002450) in their order of occurrence.
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1
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5, 3, 7, 17, 11, 31, 13, 43, 127, 257, 19, 73, 41, 23, 89, 683, 241, 8191, 2731, 29, 113, 151, 331, 65537, 131071, 43691, 37, 109, 174763, 524287, 61681, 337, 5419, 397, 2113, 47, 2796203, 178481, 97, 673, 251, 601, 4051, 1801, 53, 157, 1613, 87211, 262657, 15790321
(list; graph; refs; listen; history; internal format)
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OFFSET
| 1,1
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COMMENTS
| Read A002450 term-by-term, factorize each term, write down any primes not seen before.
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REFERENCES
| G. Everest et al., Primes generated by recurrence sequences, Amer. Math. Monthly, 11 4 (No. 5, 2007), 417-431.
K. Zsigmondy, Zur Theorie der Potenreste, Monatsh. Math., 3 (1892), 265-284.
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CROSSREFS
| Cf. A002450, A129733.
Sequence in context: A030669 A030679 A077891 * A019663 A187488 A087654
Adjacent sequences: A129732 A129733 A129734 * A129736 A129737 A129738
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KEYWORD
| nonn
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AUTHOR
| N. J. A. Sloane (njas(AT)research.att.com), May 13 2007
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