Numbers k such that the number of primes between k and 2k (inclusive) is equal to the number of primes between k and reverse(k) (inclusive).
A074814
Numbers k such that the number of primes between k and 2k (inclusive) is equal to the number of primes between k and reverse(k) (inclusive).
Terms
- a(0) =10a(1) =25a(2) =37a(3) =40a(4) =81a(5) =102a(6) =120a(7) =204a(8) =295a(9) =340a(10) =350a(11) =387a(12) =397a(13) =1620a(14) =1743a(15) =2995a(16) =3627a(17) =3997a(18) =4450a(19) =4629a(20) =4999a(21) =8090a(22) =8490a(23) =9201a(24) =9301a(25) =10002a(26) =12310a(27) =17043a(28) =20004a(29) =22954
External references
- oeis: A074814