For n > 1, a(n) is the smallest number such that n-th concatenation is prime and the smallest palindrome beginning with (but not equal to) this concatenation is also prime.

A088090

For n > 1, a(n) is the smallest number such that n-th concatenation is prime and the smallest palindrome beginning with (but not equal to) this concatenation is also prime.

Terms

    a(0) =1a(1) =3a(2) =9a(3) =13a(4) =17a(5) =271a(6) =671a(7) =489a(8) =193a(9) =819a(10) =2219a(11) =5719a(12) =5753a(13) =2391a(14) =20089a(15) =3059a(16) =231a(17) =8259a(18) =16719a(19) =18493a(20) =37967a(21) =16197a(22) =8979a(23) =28153a(24) =11583a(25) =10073a(26) =14169a(27) =57589a(28) =85073a(29) =79053

External references