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Search: id:A074316
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| A074316 |
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Abundant Fibonacci numbers. |
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+0
2
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| 144, 2584, 46368, 832040, 14930352, 102334155, 267914296, 4807526976, 86267571272, 1548008755920, 498454011879264, 23416728348467685, 160500643816367088, 2880067194370816120, 51680708854858323072
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OFFSET
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1,1
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EXAMPLE
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a(1)=144 because sum of aliquot divisors of 144( which is a fibonacci number) is 1+2+3+4+6+8+9+12+16+18+24+36+48+72=259 which is more than 144, hence it is abundant. 144 is first abundant Fibonacci number.
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MATHEMATICA
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AbundantQ[n_]:=DivisorSigma[1, n]>2n; a={}; Do[f=Fibonacci[n]; If[AbundantQ[f], AppendTo[a, f]], {n, 1, 10^2, 1}]; a (Vladimir Orlovsky, Jul 25 2008)
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CROSSREFS
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Sequence in context: A008431 A121344 A075739 this_sequence A128989 A008376 A086985
Adjacent sequences: A074313 A074314 A074315 this_sequence A074317 A074318 A074319
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KEYWORD
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nonn
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AUTHOR
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Shyam Sunder Gupta (guptass(AT)rediffmail.com), Sep 22 2002
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