login
The OEIS is supported by the many generous donors to the OEIS Foundation.

 

Logo
Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A074316 Abundant Fibonacci numbers. 3

%I #19 Sep 03 2019 03:04:24

%S 144,2584,46368,832040,14930352,102334155,267914296,4807526976,

%T 86267571272,1548008755920,498454011879264,23416728348467685,

%U 160500643816367088,2880067194370816120,51680708854858323072

%N Abundant Fibonacci numbers.

%H Amiram Eldar, <a href="/A074316/b074316.txt">Table of n, a(n) for n = 1..150</a>

%e a(1)=144 because the sum of the 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 144 is abundant. 144 is the first abundant Fibonacci number.

%t Select[Fibonacci[Range[100]],DivisorSigma[1,#]>2#&] (* _Harvey P. Dale_, Jul 27 2011 *)

%Y Intersection of A000045 and A005101.

%K nonn

%O 1,1

%A _Shyam Sunder Gupta_, Sep 22 2002

Lookup | Welcome | Wiki | Register | Music | Plot 2 | Demos | Index | Browse | More | WebCam
Contribute new seq. or comment | Format | Style Sheet | Transforms | Superseeker | Recents
The OEIS Community | Maintained by The OEIS Foundation Inc.

License Agreements, Terms of Use, Privacy Policy. .

Last modified April 24 03:08 EDT 2024. Contains 371918 sequences. (Running on oeis4.)