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Search: id:A075735
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| A075735 |
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Squarefree Fibonacci numbers with an even number of prime factors (mu(n)=1). |
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+0
2
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| 1, 1, 21, 34, 55, 377, 4181, 6765, 17711, 121393, 196418, 317811, 1346269, 2178309, 5702887, 102334155, 165580141, 32951280099, 53316291173, 139583862445, 956722026041, 2504730781961, 10610209857723, 308061521170129
(list; graph; listen)
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OFFSET
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1,3
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LINKS
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T. D. Noe, Table of n, a(n) for n=1..100
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EXAMPLE
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21 is a Fibonacci number and 21=3*7, 34 is a Fibonacci numbers and 34=2*17, ...
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MAPLE
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with(combinat, fibonacci): m1_fib := proc(n); if (numtheory[mobius](fibonacci(n))=1) then RETURN(fibonacci(n)); fi; end: seq(m1_fib(i), i=1..100);
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CROSSREFS
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Cf. A000045, A030229, A074691.
Cf. A022307, A053409, A072381
Sequence in context: A032792 A135595 A082483 this_sequence A053409 A008946 A095738
Adjacent sequences: A075732 A075733 A075734 this_sequence A075736 A075737 A075738
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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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