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 A089360 #6 Mar 31 2012 10:32:39 %S A089360 101,131,151,181,191,313,353,373,383,727,757,787,797,919,929,12101, %T A089360 14741,18181,32323,34543,35353,35753,72727,74747,75797,78787,79757, %U A089360 94949,95959,97579,1012321,1212121,1414741,1474141,1616161,3131353 %N A089360 Prime worms. %C A089360 While some palindromic primes are included, there are other criteria for addition to this sequence. %D A089360 Carlos Rivera's primepuzzles.net, Puzzle 246 %H A089360 Carlos Rivera, <a href="http://www.primepuzzles.net/puzzles/puzz_246.htm">Puzzle 246. The worms </a> %F A089360 From sequence of primes beginning with 3-digits, select those with identical first and last digits; no adjacent digits identical; and absolute value of sequential differences of paired digits a constant. %e A089360 a(15)=12101; first and last digits = 1; no identical adjacent digits; abs(1-2)=1;abs(2-1)=1; abs(1-0)=1; abs(0-1)=1; the worm is 1. %Y A089360 Cf. A089291, A089315-89317, A048398-48405. %K A089360 easy,nonn,base %O A089360 1,1 %A A089360 _Enoch Haga_, Dec 27 2003