Primes in which odd positioned digits are prime and even positioned digits are composite. The least significant digit is taken to be the first digit.
A083820
Primes in which odd positioned digits are prime and even positioned digits are composite. The least significant digit is taken to be the first digit.
Terms
- a(0) =2a(1) =3a(2) =5a(3) =7a(4) =43a(5) =47a(6) =67a(7) =83a(8) =97a(9) =263a(10) =283a(11) =293a(12) =347a(13) =367a(14) =383a(15) =397a(16) =547a(17) =563a(18) =587a(19) =593a(20) =743a(21) =787a(22) =797a(23) =4243a(24) =4283a(25) =4297a(26) =4363a(27) =4397a(28) =4547a(29) =4567
External references
- oeis: A083820