Numbers (excluding primes and powers of primes) such that the square mean of their prime factors is a prime (where the square mean of c and d is sqrt((c^2+d^2)/2)).
A134604
Numbers (excluding primes and powers of primes) such that the square mean of their prime factors is a prime (where the square mean of c and d is sqrt((c^2+d^2)/2)).
Terms
- a(0) =119a(1) =161a(2) =351a(3) =595a(4) =721a(5) =845a(6) =959a(7) =1045a(8) =1081a(9) =1241a(10) =1323a(11) =1375a(12) =1547a(13) =1792a(14) =1855a(15) =2457a(16) =2645a(17) =2737a(18) =3281a(19) =3367a(20) =3509a(21) =3887a(22) =3995a(23) =4347a(24) =4625a(25) =4655a(26) =4681a(27) =5376a(28) =5795a(29) =6545
External references
- oeis: A134604