Numbers k such that sigma(phi(k))-phi(sigma(k)) is nonzero and divisible by phi(k), that is A065395(k)/A000010(k) is a nonzero integer.
A092587
Numbers k such that sigma(phi(k))-phi(sigma(k)) is nonzero and divisible by phi(k), that is A065395(k)/A000010(k) is a nonzero integer.
Terms
- a(0) =2a(1) =18a(2) =21a(3) =99a(4) =133a(5) =151a(6) =175a(7) =183a(8) =350a(9) =366a(10) =449a(11) =450a(12) =477a(13) =532a(14) =581a(15) =645a(16) =702a(17) =843a(18) =1072a(19) =1253a(20) =1346a(21) =1508a(22) =1645a(23) =1833a(24) =2085a(25) =2097a(26) =2150a(27) =2421a(28) =3668a(29) =3950
External references
- oeis: A092587