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Sum of the aliquot divisors of n-th Fibonacci number.
3

%I #25 Feb 20 2024 07:00:22

%S 0,0,1,1,1,7,1,11,20,17,1,259,1,43,506,549,1,2816,151,5331,6778,289,1,

%T 110880,18037,755,124342,155949,1,1310680,2975,1213179,1821962,5169,

%U 2697343,33280848,506383,1416031,32030858,106878261,62159,295708904,1

%N Sum of the aliquot divisors of n-th Fibonacci number.

%H Amiram Eldar, <a href="/A074283/b074283.txt">Table of n, a(n) for n = 1..1408</a> (terms 1..250 from Paolo P. Lava)

%F a(n) = A001065(A000045(n)). - _Omar E. Pol_, Dec 20 2008

%F a(n) = A063477(n) - A000045(n). - _Amiram Eldar_, Aug 27 2020

%e a(6) = 7 because the sum of the aliquot divisors of the 6th Fibonacci number (i.e. 8) is 1 + 2 + 4 = 7.

%t Table[Total[Most[Divisors[n]]],{n,Fibonacci[Range[50]]}] (* _Harvey P. Dale_, Dec 12 2013 *)

%Y Cf. A000045, A001065, A063477. - _Omar E. Pol_, Dec 20 2008

%K nonn

%O 1,6

%A _Shyam Sunder Gupta_, Sep 21 2002