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 A110933 #26 Mar 25 2024 08:14:08 %S A110933 1,4,7,16,19,190,227,235,283,319,1655,3955,10666,30724 %N A110933 Integers k such that 3*10^k + 71 is a prime number. %C A110933 See Kamada link - primecount.txt for terms, primesize.txt for discovery details including probable or proved primes - search on "30071". %C A110933 a(15) > 10^5. - _Robert Price_, Jan 22 2017 %H A110933 Makoto Kamada, <a href="https://stdkmd.net/nrr/prime/">List of near-repdigit-related prime numbers</a>. %H A110933 <a href="/index/Pri#Pri_rep">Index entries for primes involving repunits</a>. %e A110933 k = 7 is a member because: 3*10^7 + 71 = 30000071, which is prime. %o A110933 (PARI) isok(n) = isprime(3*10^n+71); \\ _Michel Marcus_, Jan 22 2017 %Y A110933 Cf. A049054, A088274, A088275, A095688, A107083, A108049, A108050, A108052, A108054. %K A110933 more,nonn %O A110933 1,2 %A A110933 Julien Peter Benney (jpbenney(AT)ftml.net), Oct 04 2005 %E A110933 a(13) from _Ray Chandler_, Dec 23 2010 %E A110933 Prepended a(1)=1 by _Robert Price_, Jan 22 2017 %E A110933 a(14) from _Robert Price_, Jan 22 2017