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 A109574 #10 Oct 19 2021 21:32:40 %S A109574 2,3,5,7,11,101,131,181,191,353,787,797,919,10301,10601,11411,12721, %T A109574 12821,13331,13931,14741,15551,16061,16361,16561,16661,17471,19991, %U A109574 31013,35753,36263,38783,71317,72227,73037,73237,73637,74047,74747 %N A109574 Chen primes p such that p is palindromic. %H A109574 Amiram Eldar, <a href="/A109574/b109574.txt">Table of n, a(n) for n = 1..1000</a> %t A109574 chenQ[n_] := PrimeQ[n] && PrimeOmega[n + 2] < 3; Select[Range[75000], chenQ[#] && PalindromeQ[#] &] (* _Amiram Eldar_, Oct 19 2021 *) %o A109574 (PARI) isok(p) = my(d=digits(p)); isprime(p) && (bigomega(p+2) <= 2) && (d==Vecrev(d)); \\ _Michel Marcus_, Oct 19 2021 %Y A109574 Intersection of A002113 and A109611. %K A109574 base,easy,nonn %O A109574 1,1 %A A109574 _Jason Earls_, Aug 30 2005