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 A072712 #18 Feb 16 2021 00:59:47 %S A072712 2,3,5,8167,371321 %N A072712 Primes p such that p divides the (right) concatenation of all numbers from 1 to p written in base 10 (most significant digit on left). %C A072712 Right concatenation, normal order. %C A072712 Primes in A029455. - _Derek Orr_, Oct 04 2014 %H A072712 Carlos Rivera, <a href="http://www.primepuzzles.net/puzzles/puzz_190.htm">Puzzle 190. A follow up for the puzzle 188</a>, The Prime Puzzles & Problems Connection. %e A072712 p=17 is not a term since 1234567891011121314151617 is not divisible by 17. %o A072712 (PARI) p=""; n=1; while(n<10^4, p=concat(p,Str(n)); if(eval(p)%n==0&&isprime(n), print1(n,", ")); n++) \\ _Derek Orr_, Oct 04 2014 %Y A072712 Cf. A029447-A029542, A061931-A061978. %K A072712 base,more,nonn %O A072712 1,1 %A A072712 _Jeff Heleen_, Aug 07 2002 %E A072712 Another term from _Jeff Heleen_, Oct 11 2009