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Search: id:A135954
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| A135954 |
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(Nonprime Fibonacci numbers with prime indices, A050937) which have exactly 3 prime factors. |
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+0
8
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| 24157817, 44945570212853, 1500520536206896083277, 50095301248058391139327916261, 11463113765491467695340528626429782121, 3001082145496345390753066714782948988
(list; graph; listen)
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OFFSET
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1,1
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COMMENT
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Conjecture: All numbers in this sequence are products of three sums of two squares.
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MATHEMATICA
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k = {}; Do[If[ !PrimeQ[Fibonacci[Prime[n]]], c = Length[FactorInteger[Fibonacci[Prime[n]]]]; If[c == 3, AppendTo[k, Fibonacci[Prime[n]]]]], {n, 1, 50}]; k
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CROSSREFS
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Cf. A000045, A001605, A050937, A075737, A090819, A134787, A134851, A134852, A135953, A135955, A135956, A135957.
Sequence in context: A132906 A104922 A058323 this_sequence A115533 A083636 A124069
Adjacent sequences: A135951 A135952 A135953 this_sequence A135955 A135956 A135957
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KEYWORD
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nonn
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AUTHOR
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Artur Jasinski (grafix(AT)csl.pl), Dec 08 2007
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