OFFSET
1,1
COMMENTS
Any term x = a(m) in this sequence can be used with any term y in A275996 to satisfy the property (sigma(x)+sigma(y))/(x+y) = 2, which is a necessary (but not sufficient) condition for two numbers to be amicable.
EXAMPLE
a(1) = 134, since 2*134 - sigma(134) = 268 - 204 = 64.
MATHEMATICA
Select[Range[10^7], 2 # - DivisorSigma[1, #] == 64 &] (* Michael De Vlieger, Jan 10 2017 *)
PROG
(PARI) isok(n) = 2*n - sigma(n) == 64; \\ Michel Marcus, Dec 30 2016
CROSSREFS
KEYWORD
nonn
AUTHOR
Timothy L. Tiffin, Aug 16 2016
EXTENSIONS
More terms from Jinyuan Wang, Mar 02 2020
STATUS
approved