Least x = a(n) such that sum of common prime divisors (without multiplicity) of sigma(x) and phi(x) equals n, or 0 if such number (apparently) does not exist.
A082056
Least x = a(n) such that sum of common prime divisors (without multiplicity) of sigma(x) and phi(x) equals n, or 0 if such number (apparently) does not exist.
Terms
- a(0) =0a(1) =3a(2) =18a(3) =0a(4) =14a(5) =0a(6) =88a(7) =1800a(8) =116a(9) =196a(10) =9801a(11) =377a(12) =2881a(13) =1189a(14) =711a(15) =989a(16) =3596a(17) =477a(18) =6901a(19) =5203a(20) =8473a(21) =9179a(22) =3956a(23) =7067a(24) =6439a(25) =27709a(26) =41309a(27) =10763a(28) =27117a(29) =20569
External references
- oeis: A082056