login
Not of form sigma(k)-phi(k).
1

%I #11 Nov 02 2020 02:34:15

%S 1,3,4,6,8,9,12,13,17,19,21,25,29,31,37,41,43,45,46,49,51,53,55,57,58,

%T 61,65,69,70,71,77,81,82,85,89,91,93,97,99,101,103,105,109,111,113,

%U 114,115,117,118,121,125,127,130,131,133,134,137,139,141,142,145,149,151

%N Not of form sigma(k)-phi(k).

%Y Complement of A112730.

%Y Cf. A051612.

%K nonn

%O 1,2

%A _David W. Wilson_