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 A100027 #8 Apr 09 2025 21:06:50 %S A100027 101,10301,1003001,100030001,10000500001,1000008000001, %T A100027 100000323000001,10000000500000001,1000000008000000001, %U A100027 100000000212000000001,10000000000300000000001,1000000000016100000000001,100000000000080000000000001,10000000000000300000000000001,1000000000000024200000000000001 %N A100027 Smallest (2n+1)-digit palindromic prime of the form 10...0M0...01 (thus M is a palindrome with <= 2n-1 digits). %C A100027 Essentially a duplicate of A028989. - _Jeppe Stig Nielsen_, Apr 04 2025 %Y A100027 Values of M are given in A100026. Cf. A100028. %Y A100027 Cf. A028989. %K A100027 nonn,base %O A100027 1,1 %A A100027 Harvey Dubner (harvey(AT)dubner.com), Nov 20 2004