Numbers (excluding primes and powers of primes) such that the square mean of their prime factors is an integer (where the square mean of c and d is sqrt((c^2+d^2)/2)).
A134603
Numbers (excluding primes and powers of primes) such that the square mean of their prime factors is an integer (where the square mean of c and d is sqrt((c^2+d^2)/2)).
Terms
- a(0) =119a(1) =161a(2) =351a(3) =378a(4) =455a(5) =527a(6) =595a(7) =721a(8) =845a(9) =918a(10) =959a(11) =1045a(12) =1081a(13) =1241a(14) =1265a(15) =1323a(16) =1375a(17) =1547a(18) =1615a(19) =1792a(20) =1855a(21) =2047a(22) =2145a(23) =2175a(24) =2345a(25) =2457a(26) =2645a(27) =2665a(28) =2737a(29) =3281
External references
- oeis: A134603