OFFSET
1,3
LINKS
Amiram Eldar, Table of n, a(n) for n = 1..1422 (terms 1..200 from Harry J. Smith)
Florian Luca, Arithmetic Functions of Fibonacci Numbers, The Fibonacci Quarterly, Vol. 37, No. 3 (1999), pp. 265-268.
FORMULA
From Amiram Eldar, Jan 12 2022: (Start)
MATHEMATICA
DivisorSigma[2, Fibonacci[Range[30]]] (* Harvey P. Dale, Jul 05 2021 *)
PROG
(PARI) j=[]; for(n=1, 40, j=concat(j, sumdiv(fibonacci(n), d, d^2))); j
(PARI) { allocatemem(20000000); h=1; g=f=0; for (n=1, 200, f+=h; h=g; g=f; write("b063478.txt", n, " ", sumdiv(f, d, d^2)) ) } \\ Harry J. Smith, Aug 23 2009
(Sage) [sigma(fibonacci(n), 2)for n in range(1, 29)] # Zerinvary Lajos, Jun 04 2009
CROSSREFS
KEYWORD
easy,nonn
AUTHOR
Jason Earls, Jul 28 2001
STATUS
approved