Beginning with 3, least number such that concatenation of first n terms and its digit reversal both are primes.
A111382
Beginning with 3, least number such that concatenation of first n terms and its digit reversal both are primes.
Terms
- a(0) =3a(1) =1a(2) =1a(3) =21a(4) =11a(5) =43a(6) =47a(7) =157a(8) =753a(9) =51a(10) =917a(11) =273a(12) =2409a(13) =703a(14) =413a(15) =3729a(16) =1153a(17) =6243a(18) =8789a(19) =2307a(20) =4477a(21) =137a(22) =403a(23) =10649a(24) =4617a(25) =4533a(26) =6133a(27) =4721a(28) =877a(29) =2469
External references
- oeis: A111382