OFFSET
1,2
COMMENTS
Every oddly colossally abundant number (A110464) is in this sequence.
LINKS
T. D. Noe, Table of n, a(n) for n = 1..1000
Richard Laatsch, Measuring the abundancy of integers, Mathematics Magazine 59 (2) (1986) 84-92.
Walter Nissen, Abundancy : Some Resources
MATHEMATICA
rec=0; lst={}; Do[abun=DivisorSigma[1, n]/n; If[abun>rec, rec=abun; AppendTo[lst, n]], {n, 1, 10^6, 2}]; lst
PROG
(PARI) r=0; forstep(n=1, 1e6, 2, t=sigma(n)/n; if(t>r, r=t; print1(n", "))) \\ Charles R Greathouse IV, Nov 27 2013
CROSSREFS
KEYWORD
nonn
AUTHOR
T. D. Noe, May 09 2006
EXTENSIONS
Definition clarified by Jonathan Sondow, Dec 08 2011
STATUS
approved