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 A263240 #14 Nov 09 2015 16:00:54 %S A263240 13,17,31,37,71,73,79,97,107,113,149,157,167,179,199,311,337,347,359, %T A263240 389,701,709,733,739,743,751,761,769,907,937,941,953,967,971,983,991, %U A263240 1009,1223,1229,1559,1669,3221,3889,7229,9001,9221,9227,9551,9661,10007,10009,10909,11717,11719,12227,12323,12829,13337,13933,14143,14447,14449,14549,14843,14947 %N A263240 Emirps whose reversals are merely their end digits swapped. %C A263240 Subsequence of emirps A006567 with which it is identical for the first 37 terms. %C A263240 Entries with 4 or more digits consist of a middle repdigit or palindrome part inserted between the end digits. %Y A263240 Cf. A006567, A263241, A263242. %K A263240 nonn,base %O A263240 1,1 %A A263240 _Lekraj Beedassy_, Oct 13 2015