a(n) is a prime, such that a(n) = p^d-2 where p is a prime and d is the number of digits of p.
A280427
a(n) is a prime, such that a(n) = p^d-2 where p is a prime and d is the number of digits of p.
Terms
- a(0) =3a(1) =5a(2) =167a(3) =359a(4) =839a(5) =1367a(6) =1847a(7) =2207a(8) =3719a(9) =5039a(10) =7919a(11) =1295027a(12) =3442949a(13) =9393929a(14) =13997519a(15) =21253931a(16) =49430861a(17) =84604517a(18) =95443991a(19) =237176657a(20) =329939369a(21) =384240581a(22) =487443401a(23) =633839777a(24) =904231061
External references
- oeis: A280427