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Search: id:A157420
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| A157420 |
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a(0)=1. a(n) = the smallest integer coprime to a(n-1) and greater than the nth Fibonacci number. |
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4
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| 1, 2, 3, 4, 5, 6, 11, 14, 23, 35, 57, 91, 145, 234, 379, 611, 989, 1598, 2587, 4182, 6767, 10947, 17713, 28658, 46371, 75026, 121395, 196421, 317812, 514233, 832042, 1346271, 2178310, 3524579, 5702889, 9227467, 14930353, 24157818, 39088171
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OFFSET
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0,2
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EXAMPLE
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a(7) = 14, and the 8th Fibonacci number is 21. So, for a(8) we want the smallest integer that is both coprime to 14 and is > 21. Checking: 22 is not coprime to 14. But 23 is coprime to 14, so a(8) = 23.
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CROSSREFS
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Cf. A157419, A157421.
Sequence in context: A084588 A088411 A075073 this_sequence A058243 A060733 A033078
Adjacent sequences: A157417 A157418 A157419 this_sequence A157421 A157422 A157423
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KEYWORD
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nonn
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AUTHOR
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Leroy Quet (q1qq2qqq3qqqq(AT)yahoo.com), Feb 28 2009
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EXTENSIONS
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Extended by Ray Chandler (rayjchandler(AT)sbcglobal.net), Jun 19 2009
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