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Search: id:A079506
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| A079506 |
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Numbers n with gcd(2^n-1,fibonacci(n))>1 and not divisible by 2 or 11. Odd members of A074776 not divisible by 11. |
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+0
4
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| 261, 305, 333, 377, 525, 651, 753, 783, 895, 915, 999, 1131, 1305, 1475, 1525, 1575, 1665, 1827, 1885, 1953, 2135, 2235, 2259, 2265, 2283, 2319, 2331, 2349, 2515, 2601, 2625, 2639, 2685, 2743, 2745, 2867, 2921, 2975, 2997, 3255, 3393, 3549, 3675, 3765
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OFFSET
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1,1
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EXAMPLE
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Example: gcd(2^261-1,fibonacci(261))=2089 and 11 does not divide 261, so 261 is in sequence.
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PROGRAM
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(PARI) for(k=1, 5000, if(gcd(2^k-1, fibonacci(k))>1, if(k%2, if(k%11, print1(k", ")))))
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CROSSREFS
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Cf. A074776.
Sequence in context: A045026 A131071 A131062 this_sequence A028527 A014569 A063364
Adjacent sequences: A079503 A079504 A079505 this_sequence A079507 A079508 A079509
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KEYWORD
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nonn
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AUTHOR
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Ralf Stephan (ralf(AT)ark.in-berlin.de), Jan 21 2003
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