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Search: id:A075739
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| A075739 |
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Non-square-free Fibonacci numbers whose indices are also not square-free. |
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+0
2
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| 144, 2584, 46368, 75025, 14930352, 4807526976, 12586269025, 86267571272, 225851433717, 1548008755920, 498454011879264, 2111485077978050, 160500643816367088, 2880067194370816120, 51680708854858323072
(list; graph; listen)
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OFFSET
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1,1
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EXAMPLE
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Fib(18)=2584 is there because neither 18 nor 2584 is square-free.
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MAPLE
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with(combinat, fibonacci): fib_supM_ndsk := proc(n); if (numtheory[issqrfree](n)='false') then if (numtheory[issqrfree](fibonacci(n))='false') then RETURN(fibonacci(n)); fi; fi; end: seq(fib_supM_ndsk(i), i=1..200);
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CROSSREFS
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Cf. A000045, A013929, A061899, A075738.
Sequence in context: A066445 A008431 A121344 this_sequence A074316 A128989 A008376
Adjacent sequences: A075736 A075737 A075738 this_sequence A075740 A075741 A075742
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KEYWORD
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easy,nonn
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AUTHOR
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Jani Melik (jani_melik(AT)hotmail.com), Oct 07 2002
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EXTENSIONS
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Edited by Don Reble (djr(AT)nk.ca), Nov 05 2005
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