This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.
%I A128375 #14 Sep 02 2025 01:52:14 %S A128375 919,929,90709,91019,93139,93239,93739,94049,94349,94649,94849,94949, %T A128375 95959,96269,96469,96769,97379,97579,97879,98389,98689,9002009, %U A128375 9015109,9024209,9037309,9042409,9043409,9045409,9046409,9049409,9067609,9073709,9076709,9078709 %N A128375 Palindromic primes that start and end with 9. %C A128375 Subsequence of A002385 (palindromic primes) and A002113 (palindromic numbers). Complement of A222729 (palindromic composite numbers starting with a digit 9) with respect to A043044 (palindromic numbers starting with a digit 9). - _Jaroslav Krizek_, Mar 09 2013 %H A128375 Jaroslav Krizek, <a href="/A128375/b128375.txt">Table of n, a(n) for n = 1..1000</a> %t A128375 Select[Prime[Range[607000]], Reverse[x = IntegerDigits[#]] == x && First[x] == 9 &] (* _Jayanta Basu_, Jun 24 2013 *) %Y A128375 Cf. A002385, A128374, A128376. %K A128375 nonn,base,less,changed %O A128375 1,1 %A A128375 _Lekraj Beedassy_, Feb 27 2007 %E A128375 Extended by _Ray Chandler_, Feb 28 2007