Primes p such that both pi(p) and the concatenation of pi(p) and p are prime, where pi is the prime counting function.
A155032
Primes p such that both pi(p) and the concatenation of pi(p) and p are prime, where pi is the prime counting function.
Terms
- a(0) =3a(1) =59a(2) =83a(3) =179a(4) =283a(5) =353a(6) =431a(7) =709a(8) =1433a(9) =2269a(10) =2381a(11) =3559a(12) =3593a(13) =4153a(14) =5503a(15) =6899a(16) =7109a(17) =7351a(18) =7649a(19) =8513a(20) =11909a(21) =13297a(22) =14107a(23) =14437a(24) =14591a(25) =16073a(26) =16127a(27) =16451a(28) =16901a(29) =17117
External references
- oeis: A155032