Primes that can be generated by the concatenation in base 7, in descending order, of two consecutive integers read in base 10.
A287309
Primes that can be generated by the concatenation in base 7, in descending order, of two consecutive integers read in base 10.
Terms
- a(0) =7a(1) =23a(2) =31a(3) =47a(4) =449a(5) =499a(6) =599a(7) =1049a(8) =1249a(9) =1399a(10) =1499a(11) =1549a(12) =1699a(13) =1949a(14) =1999a(15) =2099a(16) =2399a(17) =18919a(18) =20639a(19) =20983a(20) =24767a(21) =25111a(22) =25799a(23) =29927a(24) =30271a(25) =31991a(26) =33023a(27) =38183a(28) =40591a(29) =45751
External references
- oeis: A287309