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 A099181 #3 Aug 13 2020 14:01:06 %S A099181 31,41,61,71,83,311,331,401,421,431,461,491,521,541,571,601,631,641, %T A099181 661,691,701,733,743,751,761,773,811,821,823,853,863,881,883,911,941, %U A099181 953,971,983,991,2311,2411,2521,2621,2711,2801,3001,3011,3041,3121,3221 %N A099181 Primes p which are greater than twice p reversed. %H A099181 Erich Friedman, <a href="https://erich-friedman.github.io/numbers.html">What's Special About This Number?</a>. %e A099181 31 is in the sequence since 31 > 2*13. %t A099181 Select[ Prime[ Range[ 460]], # > 2FromDigits[ Reverse[ IntegerDigits[ # ]]] &] %K A099181 base,nonn %O A099181 1,1 %A A099181 _Robert G. Wilson v_, Oct 01 2004